22-25 SEPTEMBER - Convitto della Calza

co-located event TIWDCTyrrhenian International Workshop on Digital Communications

22 September 2015

PROGRAMME

TimeTuesday - September 22 Wednesday - September 23 Thursday - September 24 Friday - September 25

Pontevecchioroom Pitti room Franciabigio

roomPontevecchio

room Pitti room Franciabigio room

Pontevecchio room Pitti room Franciabigio

roomPontevecchio

room Pitti room Franciabigio room

8:30

9:00

9:00-10:45 TIWDC 2015

Session 1

Opening Remarks

9:00-10:30ThI1

SC1 Multi-Tone Multi-

Wavelength Generation

9:00-10:30ThII1SC3

Transmission Systems and

Devices

9:00-10:30ThIII1

SC4 Data Centre Networks

9:00-10:15FrI1

SC1 Silicon Devices

9.00-10.30FrII1

SC2 Advanced Modulation and Signal Processing

9.00-10.30 FrIII1 SC3

Transmission Systems

9:30

9:30-11:30 Plenary Session

10:00

10:30 10:30 - 11:00 Break 10:30 - 11:00 Break10:45-11:20 Break11:00

11:00-13:00ThI2SC1

Semicnductor Network

Subsystems

11:00-13:00ThII2

SC2 Photonic Switching

Technologies I

11:00-12:45ThIII2

SC4 Spectrally and Spatially

Flexible Optical Networking

11:00-12:30FrI2

SC4 Optical Network Control

11.00-12.30FrII2

SC2 Photonic Switching

Technologies II11:20-13:00 TIWDC 2015

Session 2

11:30 11:30 - 12:00 Break 11.30-12.30FrIII2

SC3 Optical Switch

Architecture

12:00 12:00-13:00WeI1

SC1 Photonic Integrated

Circuits

12:00-13:00WeII1

SC3 Optical Technologies for Future Photonic

Networks

12:00-13:00WeIII1

SC4 The Evolution of Optical Networks

12:30 Closing Remarks

Wine Tour 13:00-17:30Fattoria Vignavecchia

Radda in Chianti

13:00 13:00 - 14:00 Lunch13:00 - 14:30 Lunch 13:00 - 14:30 Lunch13:30

14:00

14:00-16:00Topical

Workshop 1

14:00-16:00TIWDC 2015

Session 3

14:00-16:00Topical

Workshop 3

14:30

14:30-16:00WeI2

SC1 WDM Silicon Devices

14:30-16:00WeII2

SC3 Optical Signal

Processing

14:30-16:00WeIII2

SC2 Optical Signal

Processing and Wavelength Conversion

14:00-16:00 Poster Session

15:30-16:30 Coffee Break

15:00

15:30

16:00 16:00 -16:30 Break 16:00 -16:30 Break 16:00-17:00ThI3

SC1 Switching Elements

16:00-17:30ThII3

SC3 Optical Packet

Switching Technologies

16:00-17:30ThIII3

SC4 Next Generation Converged

Wireless/Optical Networks

16:30

16:30-18:30Topical

Workshop 2

16:30-18:30 TIWDC 2015

Session 4

16:30-18:30Topical

Workshop 4

16:30-18:00WeI3

SC1 Photonic-Crystals and

Wires Devices

16:30-18:00WeII3

SC3 ROADM Technologies

16:30-17:45WeIII3

SC4 Optical Network

Architecture

17:00

17:30 17:30-18:00 Post-Deadline PapersBest Paper, Paper Awards

18:0018:30

Get-Together Reception Mercato di Firenze19:00

19:3020:0020:30

Social DinnerPalazzo Borghese21:30

22:30

PROGRAMME AT A GLANCE

22 SEPTEMBER - Convitto della Calza - Pitti room

2

General ChairEnrico Forestieri, Scuola Superiore Sant’Anna, Italy

Technical Programme Committee ChairMarco Secondini, Scuola Superiore Sant’Anna, Italy

Technical Programme CommitteeErik Agrell, Chalmers University of Technology, Sweden

Polina Bayvel, University College London, United Kingdom Gabriella Bosco, Politecnico di Torino, Italy

Antonio Mecozzi, University of L’Aquila, Italy Klaus Petermann, Technische Universität Berlin, Germany

Paolo Serena, University of Parma, Italy Mark Shtaif, Tel Aviv University, Israel

Sergei Turitsyn, Aston University, United Kingdom

Local Organising CommitteeFrancesca Bontempi, Scuola Superiore Sant’Anna, Italy

Federica Fornai, Scuola Superiore Sant’Anna, Italy Luca Giorgi, Ericsson, Italy

Muhammad Imran, Scuola Superiore Sant’Anna, Italy Antonia Mastropaolo, Scuola Superiore Sant’Anna, Italy

Francesco Paolucci, Scuola Superiore Sant’Anna, Italy Valeria Vercesi, Scuola Superiore Sant’Anna, Italy

Social EventsThe welcome reception will be a full immersion into

traditional food, history, and art of Tuscany at the Mercato di Firenze on September 22nd evening.Extra tickets can be purchased at the Secretariat

Desk at the cost of 30,00 euro.

Sponsors

Tyrrhenian International Workshop on Digital Communications 2015:

Fiber Nonlinearity in Coherent Optical Communications

The quest for higher spectral efficiency and data rate made possible by coherent techniques

has to face the problem of fiber nonlinearities. Today, any design based on advanced techniques requiring knowledge of the statistical properties

of the received signal is carried on either by simply neglecting the ensuing of nonlinearities or on simplifying assumptions. Moreover, major

conferences on optical communication are generally focused on technological rather than theoretical

aspects. This workshop aims at laying special stress on in-depth theoretical investigation about the

impact of fiber nonlinearities in coherent optical communication systems.

Internet AccessFree WIFI Internet access is available throughout the

conference venue with no time limit.Username: wificalza - Password: calza2013

3

TIWDC 2015 TECHNICAL PROGRAMME

September 22, Morning

9:00 Opening

Session 1: Channel Modeling for Nonlinear Propagation

Chairman: Sergei Turitsyn (Aston University)

9:20 P1.1: On the Nonlinear Reference Phasein Regular Perturbation Models*

P. Serena and A. Bononi

9:40 P1.2: Propagation Effects in Optical Fibers for Space-DivisionMultiplexed Transmission*

C. Antonelli

10:00 P1.3: Numerical Solution of the Direct Scattering Problemfor the Nonlinear Schrödinger EquationL. Fermo, C. van der Mee, and S. Seatzu

10:15 P1.4: Nonlinear Noise Characterization in Highly DispersiveOptical Transmission SystemsF. Matera

10:30 P1.5: Numerical Methods for the InverseNonlinear Fourier TransformS. Civelli, L. Barletti, and M. Secondini

10:45 Coffee Break

Session 2: Transmission and Detection Strategies

Chairman: Paolo Serena (Università di Parma)

11:20 P2.1: Nonlinear Fourier Transform and Eigenvalue Communications*

S. Turitsyn

11:40 P2.2: Receiver-Based Strategies for Mitigating Nonlinear Distortionin High-Speed Optical Communication Systems*

T. Xu, G. Liga , N. A. Shevchenko , R. I. Killey, P. Bayvel

12:00 P2.3: Inter-Band Nonlinear Interference Canceler for Long-HaulCoherent Optical OFDM TransmissionA. Amari, P. Ciblat, and Y. Jaouën

12:15 P2.4: Digital Back Propagation in Soliton Coherent TransmissionO. Yushko, A. Redyuk, M. Fedoruk, S. Turitsyn, K. Blow,N. Doran, and A. Ellis

12:30 P2.5: Nonlinearity Compensation: Is the Knowledge of AbsoluteAmplitude and Phase Really Necessary?N. Alic, E. Temprana, E. Myslivets, and S. Radic

12:45 P2.6: Experimental Demonstration of Long Haul Transmissionof Eigenvalue Modulated SignalsA. Maruta, A. Toyota, Y. Matsuda, and Y. Ikeda

13:00 Lunch

*Invited Paper

1

September 22, Afternoon

Session 3: System Aspects of Non-Linear Transmission

Chairman: Gabriella Bosco (Politecnico di Torino)

14:25 P3.1: Theoretical and Experimental Assessment of NonlinearityMitigation through Symbol Rate Optimization*

P. Poggiolini, G. Bosco, A. Carena, V. Curri, Y. Jiang,S. M. Bilal, A. Nespola, L. Bertignono, S. Abrate,and F. Forghieri

14:45 P3.2: On the Impact of Carrier Phase Estimation on PhaseCorrelations in Coherent Fiber TransmissionT. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson,and M. Karlsson

15:00 P3.3: On the Performance of Digital Back-Propagationfor Imperfect Knowledge of Link DesignR. Rath and W. Rosenkranz

15:15 P3.4: Wavelength Division Multiplexed Optical EigenvalueModulated SystemA. Toyota and A. Maruta

15:30 P3.5: Transmission Performances of 400 Gbps Coherent 16-QAMMulti-Band OFDM Adopting Nonlinear Mitigation TechniquesM. Song, E. Pincemin, V. Vgenopoulou, and I. Roudas

15:45 P3.6: Review on Phase Preserving Amplitude Regeneration forPhase-Coded Signals Exploiting FWM in a Saturated SOAV. Vercesi, G. Serafino, A. Bogoni, and C. Porzi

16:00 Coffee Break

Session 4: Theoretical Limits in Fiber-Optic Communication

Chairman: Marco Secondini (Scuola Superiore Sant’Anna)

16:30 P4.1: Exploring the Limits of Receiver-Side Non-Linearity Mitigation*

H. Wymeersch

16:50 P4.2: Capacity Bounds for the Nonlinear Schrödinger Channel*

M. Yousefi

17:10 P4.3: Spectral Efficiency Estimate for Non-linear Optical Fibers*

P. Kazakopoulos and A. Moustakas

17:30 P4.4: Information Theory Analysis of Nonlinear RegenerativeChannelsM. Sorokina, S. Sygletos, and S. Turitsyn

17:45 P4.5: BICM Capacity Analysis of 8QAM-Alternative ModulationFormats in Nonlinear Fiber TransmissionK. Kojima, T. Koike-Akino, D. S. Millar, and K. Parsons

18:00 Closing

*Invited Paper

2

TIWDC Tyrrhenian International Workshop on Digital Communications Convitto delle Calze - Pitti Room - Florence - 22 September 2015

Technical Programme

4

SESSION 1: Channel Modeling for Nonlinear Propagation

Title Author(s) Abstract

P1.1 (9:20)

On the Nonlinear ReferencePhase in Regular Perturbation

Models

P. SerenaA. Bononi

We provide an analytical expression of the nonlinear phase induced by theKerr effect that highlights its dependence on the modulation format and onthe link parameters. We show that such a nonlinear phase must be usedin regular-perturbation models in order to minimize their modeling error. Wedetail the case of dispersion-managed systems as an application example.

P1.2 (9:40)

Propagation Effects in OpticalFibers for Space-DivisionMultiplexed Transmission

C. Antonelli

In this talk we review the major propagation effects involved in Space-DivisionMultiplexed transmission based on multi-mode fiber optic structures (MMFs).These include random mode coupling, modal dispersion, and nonlinearities.We show that in the regime of strong coupling between modes the equationsdescribing nonlinear propagation in MMFs assume the form of coupled gen-eralized Manakov equations and discuss their implications.

P1.3 (10:00)

Numerical Solution of theDirect Scattering Problem for

the Nonlinear SchrödingerEquation

L. FermoC. van der Mee

S. Seatzu

We illustrate a numerical method to compute the scattering data for theZhakarov-Shabat system associated to the initial value problem for the non-linear Schrödinger equation. This numerical method which, to our best knowl-edge, is the first method proposed to compute all scattering data under gen-eral assumptions, is based on the version of the Inverse Scattering Transformmethod proposed by one of the authors.

P1.4 (10:15)

Nonlinear NoiseCharacterization in Highly

Dispersive OpticalTransmission Systems

F. Matera

This paper reports an analytical investigation, confirmed by numerical simula-tions, about the nonlinear noise impact on the performance of single-channelsystems adopting generic modulation-detection formats and operating in longlinks with both managed and unmanaged dispersion compensation. Such anoise contribution is analyzed in terms of a pulse nonlinear interaction length,that depends on the link dispersion characteristics and on the modulation-detection format.

P1.5 (10:30)

Numerical Methods for theInverse Nonlinear Fourier

Transform

S. CivelliL. Barletti

M. Secondini

We introduce a new numerical method for the computation of the inverse non-linear Fourier transform and compare its computational complexity and accu-racy to those of other methods available in the literature. For a given accuracy,the proposed method requires the lowest number of operations.

5

SESSION 2: Transmission and Detection Strategies

Title Author(s) Abstract

P2.1 (11:20)

Nonlinear Fourier Transform andEigenvalue Communications

S. Turitsyn

Many of the current optical transmission techniques were developed for linear communicationchannels and are constrained by the fibre nonlinearity. Recently ressurected nonlinear Fouriermethod offers radically different approaches to signal coding, transmission and processing. I willoverview recent progress in application of the powerful method of the inverse scattering transform,also known as the nonlinear Fourier transform, to fibre communication systems.

P2.2 (11:40)

Receiver-Based Strategies forMitigating Nonlinear Distortion in

High-Speed OpticalCommunication Systems

T. XuG. Liga

N.A. ShevchenkoR. I. KilleyP. Bayvel

Transmission rate and spectral efficiency of optical communication systems can be enhancedusing higher modulation formats and closer channel spacing. However, such systems are signifi-cantly affected by intra-channel and inter-channel fibre nonlinearities. By using multi-channel digi-tal back-propagation, nonlinear signal-signal interactions can be, in principle, fully removed withinthe bandwidth of the nonlinear compensation. Alternatively, detection strategies tailored to theoptical fibre channel can also effectively mitigate nonlinear transmission impairments and in somecase achieve the optimal performance. Analysis and discussion on the influence of fibre nonlinear-ities and the performance of receiver-side techniques (multi-channel digital back-propagation andoptimum detection) for counteracting the nonlinear distortions in optical communication systemswill be described.

P2.3 (12:00)

Inter-Band Nonlinear InterferenceCanceler for Long-Haul Coherent

Optical OFDM Transmission

A. AmariP. Ciblat

Y. Jaouën

In the context of long-haul multi-band coherent OFDM transmission (at 400 Gbps), we proposean inter-band nonlinear interference canceler based on Volterra series. This new type of receiversignificantly improves the BER performance compared to the standard third-order inverse Volterraseries nonlinear equalizer.

P2.4 (12:15)

Digital Back Propagation in SolitonCoherent Transmission

O. YushkoA. RedyukM. FedorukS. Turitsyn

K. BlowN. DoranA. Ellis

We have revised soliton transmission in the new context of coherent optical detection optimizingand comparing digital backward propagation and in-line optical filtering as a means to suppresssoliton timing and phase jitter. We find that in-line optical filtering allows one to improve the reach ofthe soliton system by up to the factor of two. We compared jitter suppression for transmission linksusing different types of fiber. We showed that with launch power growth jitter suppression is lessefficient. However, our results show that nonlinear propagation can lead to enhanced performanceof the fiber network systems.

P2.5 (12:30)

Nonlinearity Compensation: Is theKnowledge of Absolute Amplitude

and Phase Really Necessary?

N. AlicE. TempranaE. Myslivets

S. Radic

We discuss necessary and sufficient conditions conducive to the reversal of nonlinear interactionin fiber optic transmission. While the complete information about complex amplitude and phase ofthe electric field certainly allows reversal of the nonlinear interaction, it is shown that knowledgeabout carriers’ frequencies in WDM represents a sufficient condition for a successful compensationof the nonlinear impairment.

P2.6 (12:45)

Experimental Demonstration ofLong Haul Transmission of

Eigenvalue Modulated Signals

A. MarutaA. Toyota

Y. MatsudaY. Ikeda

Eigenvalues of the associated equation of the nonlinear Schrödinger equation are mathematicallyinvariable. We experimentally demonstrate the eigenvalues can be almost conserved for longerthan 1,500km in wavelength division multiplexed optical fiber transmission line for the first time.

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SESSION 3: System Aspects of Non-Linear Transmission

Title Author(s) Abstract

P3.1 (14:25)

Theoretical and ExperimentalAssessment of Nonlinearity

Mitigation through Symbol RateOptimization

P. PoggioliniG. BoscoA. Carena

V. CurriY. Jiang

S. M. BilalA. Nespola

L. BertignonoS. Abrate

F. Forghieri

We investigated the reach increase obtained through non-linearity mitigationby means of transmission symbol rate optimization (SRO). First, we did thistheoretically and simulatively. We found that for PM-QPSK systems at full-C-band the reach increase may be substantial, on the order of 10%-25%, withoptimum symbol rates on the order of 2-to-6 GBaud. We extended the inves-tigation to PM-16QAM, where we found a qualitatively similar effect, althoughthe potential reach increase is typically only about half that of PM-QPSK. Wethen set up an experiment to obtain confirmation of the theoretical and simu-lative predictions. We demonstrated a reach increase of 11% in a 19-channel,128 Gbit/s per channel, PM-QPSK experiment, when going from single-carrierto multi-subcarrier (up to 16 subcarriers per channel) transmission. The ex-periment reached 14,100 km over PSCF, with 110 km spans and EDFA- onlyamplification. The results matched well the EGN model predictions.

P3.2 (14:45)

On the Impact of Carrier PhaseEstimation on Phase

Correlations in Coherent FiberTransmission

T. FehenbergerN. Hanik

T. A. ErikssonP. Johannisson

M. Karlsson

Carrier phase estimation (CPE) is an integral part of the digital signal pro-cessing (DSP) of coherent optical communication systems as it compensateslaser phase noise (LPN) introduced by free-running transmitter and local os-cillating (LO) lasers. Nonlinear interactions during propagation are anothersource of correlated phase noise. In this paper, we show through simulationsand in experiments that blind decision-directed (DD) CPE with regular blocklengths removes a large portion of the memory. This makes it virtually impos-sible in practice to quantify correlations that come from propagation effects,or to obtain rate gains by exploiting the nonlinear phase noise (NLPN). LargerCPE block lengths leave the memory partly intact. This, however, comes atthe expense of reduced information rates. We are able to fully recover thisrate loss in simulations by using idealized processing of phase distortions. Inexperiments with full DSP, an almost full rate recovery is reported.

P3.3 (15:00)

On the Performance of DigitalBack-Propagation for Imperfect

Knowledge of Link Design

R. RathW. Rosenkranz

Digital back-propagation (DBP) was shown to have the potential to becomethe most promising method for compensation of fiber nonlinearities. However,apart from its high computational effort, the performance of DBP is depen-dent on the knowledge of the transmission link, i.e. the link’s dispersion mapas well as its power profile. In this contribution, we investigate the perfor-mance of DBP under the assumption of an imperfect link-design knowledge,and discuss its implications in an optical network scenario.

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SESSION 3: System Aspects of Non-Linear Transmission

Title Author(s) Abstract

P3.4 (15:15)

Wavelength DivisionMultiplexed Optical Eigenvalue

Modulated System

A. ToyotaA. Maruta

Wavelength division multiplexing is essential for achieving large capacity op-tical fiber transmission for any kind of modulation format. In this paper, wepropose a wavelength division multiplexed optical eigenvalue modulated sys-tem and discuss its advantages and remaining issues for practical application.

P3.5 (15:30)

Transmission Performances of400 Gbps Coherent 16-QAMMulti-Band OFDM Adopting

Nonlinear MitigationTechniques

M. SongE. Pincemin

V. VgenopoulouI. Roudas

We experimentally study the transmission of a 400 Gbps coherent 16-QAMmulti-band OFDM superchannel over a 10x100 km G.652 fibre-based WDMtransmission line. We investigate the performance of Volterra-based and dig-ital back- propagation-based nonlinear equalizers over three scenarios withdifferent quantities of inter-channel nonlinearities.

P3.6 (15:45)

Review on Phase PreservingAmplitude Regeneration for

Phase-Coded SignalsExploiting FWM in a Saturated

SOA

V. VercesiG. SerafinoA. BogoniC. Porzi

All-optical phase-preserving amplitude regeneration is an effective method toreduce nonlinear phase noise in long-haul transmission of phase-modulatedsignals. Here we review the latest results on a proposed differential phaseshift keying (DPSK) regeneration scheme exploiting a compact architecturebased on a saturated semiconductor optical amplifier. The scheme allowsfor amplitude-only signal regeneration with limited excess phase-noise con-tribution. Both the pass-through (PT) and the four wave mixing (FWM) sig-nals exhibit enhanced Q-factor and margin improvement in bit error rate vsreceiver threshold measurements, making the configuration suitable for bothwavelength-preserving optical regeneration and wavelength regenerative con-version. The regeneration through FWM has an higher resilience to noisethan the PT and its polarization dependency can be eliminated with the imple-mentation of a dual co-polarized pump scheme. Preliminary experiments ofsimultaneous regeneration of two DPSK data streams are also provided.

8

SESSION 4: Theoretical Limits in Fiber-Optic Communication

Title Author(s) Abstract

P4.1 (16:30)

Exploring the Limits ofReceiver-Side Nonlinearity

Mitigation

H. Wymeersch

Coherent optical communications is limited by nonlinear impairments, astransmission systems move towards higher-order modulation formats, whichrequire higher input powers. Digital back-propagation and stochastic digitalback-propagation can compensate for nonlinear impairments, but are bothinherently suboptimal. In this talk, we describe several ongoing research di-rections towards the development of a truly optimal receiver.

P4.2 (16:50)

Capacity Bounds for theNonlinear Schrödinger Channel

M. Yousefi

We present bounds on the capacity of the stochastic nonlinear Schrödingerequation in one dimension, modeling signal propagation in single-mode opti-cal fiber with amplification. Some generalizations to the Manakov system arediscussed.

P4.3 (17:10)

Spectral Efficiency Estimate forNon-linear Optical Fibers

P. KazakopoulosA. Moustakas

Optical fiber communications can be analyzed using the non-linearSchroedinger equation, which is fully integrable. In this paper we show howthis integrability can be exploited to communicate using solitonic pulses. Dueto the presence of Gordon-Haus jitter, here we need to analyze the informationcontent of point sets, rather than sequences. Based on a white Gaussian inputsignal distribution we use the known distribution of eigenvalues and distribu-tion of scattering data to come up with an estimate for the spectral efficiency,taking into account the effects of noise due to amplification explicitly.

P4.4 (17:30)

Information Theory Analysis ofRegenerative Channels

M. SorokinaS. SygletosS. Turitsyn

In this paper we summarize our recently proposed work on the informationtheory analysis of regenerative channels. We discuss how the design andthe transfer function properties of the regenerator affect the noise statisticsand enable Shannon capacities higher than that of the corresponding linearchannels (in the absence of regeneration).

P4.5 (17:45)

BICM Capacity Analysis of8QAM-Alternative Modulation

Formats in Nonlinear FiberTransmission

K. KojimaT. Koike-Akino

D. S. MillarK. Parsons

We investigate the nonlinear performance of 8QAM-alternative 4D modulationformat using GMI to evaluate the BICM capacity. Due to its constant modulusfeature, the 4D-2A8PSK modulation has higher nonlinear threshold than Star-8QAM and Circular-8QAM.

22-25 SEPTEMBER - Convitto della Calza

10

Internet AccessFree WIFI Internet access is available throughout the conference venue with no time limit.Username: wificalza - Password: calza2013

VenueConvitto della Calza • Piazza della Calza, 6 • Florence • Italy • Ph. +39 055 222 287The Convitto della Calza - Oltrarno Meeting Centre is a charming, professional venue for very prestigious events. The splendid fourteenth-century setting and the most modern technological equipments to hand make it unique in Florence.All presentation rooms will be equipped with a computer, a data projector, a microphone (for large rooms), a lectern, and a pointing device.

Social EventsThe welcome reception will be a full immersion into traditional food, history, and art of Tuscany at the Mercato di Firenze on September 22nd evening.The social dinner will be held at Palazzo Borghese, one of the most beautiful and elegant palaces in the centre of the city on September 24th night. A wine tour has been organised at the price of 30,00 euro on September 25th. Bus transfer from Florence (Convitto della Calza venue) to Radda in Chianti will depart from the venue at the end of the conference (13.00 hrs) to Fattoria Vignavecchia.The tour will include visit of the cellar and vinsantaia followed by the tasting of on Chianti Classico DOCG Regular, one Chianti Classico DOCG Riserva, one Red IGT wine with typical food of Tuscany like pecorino cheese with honey and jams, salamI, and their olio extra vergine di oliva. The tour will terminate at the conference venue in Florence at about 17.30 hrs.Extra tickets for welcome reception (30,00 euro) and social dinner (70,00 euro) can be purchased at the Secretariat Desk.

RegistrationThe registration fee for delegates includes: ● Admission to all the scientific sessions, including Workshops (PS2015 and TIWDC2015)● Conference materials and proceedings● Coffee breaks and lunches● Get-Together Reception Collection of Conference documents:All documents, and name badge can be obtained from the On-site Conference Secretariat, open for the duration of the Conference.E-mail for individual enquires: ps2015@cnit.it for general information regarding administrative aspects or directly to the chairs regarding submission and technical Programme information.

Late Registration (TIWDC 2015 included)

(VAT is not included)

Standard rate IEEE/OSA members 615 €

Standard rate NON IEEE/OSA members 695 €

Students rate IEEE/OSA members 265 €

Students rate NON IEEE/OSA members 325 €

Banquet 70 €

Local Organising CommitteeFrancesca Bontempi, Scuola Superiore Sant’Anna, Italy

Federica Fornai, Scuola Superiore Sant’Anna, ItalyLuca Giorgi, Ericsson, Italy

Muhammad Imran, Scuola Superiore Sant’Anna, ItalyAntonia Mastropaolo, Scuola Superiore Sant’Anna, Italy

Francesco Paolucci, Scuola Superiore Sant’Anna, ItalyValeria Vercesi, Scuola Superiore Sant’Anna, Italy

Organising SecretariatDGMP srl

Via a. Gozzini, 4 - 56121 Pisa, ItalyPh. +39 050 989310 - Fax +39 050 981264

info@dgmp.it - www.dgmp.it

General Information

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Programme Workshops - September 22nd

14:00-16:00 WS1 - Photonics in data centres and modern computing I: Interconnection and switch technologies

Organisers: Odile Liboiron-Ladouceur, McGill Univ., Canada and Jonathan Klamkin, Boston Univ., USAPontevecchio room

Abstract: Photonic switch technologies offer a scalable, small footprint and low power consumption alternative to traditional electrical switches. CMOS-compatible silicon photonics, in particular, is well suited to meet the demands of future switching fabrics in data centres and modern computing systems. This workshop will bring together leaders in this field to discuss current and future directions for photonic switch technologies.

Ming Wu, Univ. of California Berkeley, USA Nicola Andriolli, Scuola Superiore Sant’Anna, Italy Ben Yoo, Univ. of California Davis, USA Po Dong, Alcatel-Lucent Bell Laboratories, USA Anand Ramaswamy, Aurrion, USA Patty Stabile, Technische Universiteit Eindhoven, The Netherlands

16:30-18:30 WS2 - Photonics in data centres and modern computing II: Intra-Data Centre Systems

Organisers: Clint Schow, UCSB, USA and Dominique Chiaroni, ALU Bell Labs, FrancePontevecchio room

Session 1: Photonics systems for intra-data centres

Chair of the session 1: Clint Schow, UCSB, USA

Abstract: Datacentres represented more than 51% of the energy consumption of the worldwide ICT in 2013. It is expected that the energy consumption of data centres will continue to grow and dominate. It is then mandatory to investigate new approaches and new technologies to reduce the energy consumption of data centres.

Optical technologies have a high potential to increase the energy efficiency in particular by exploiting the WDM dimension. Typically we distinguish three main layers in a data centres: the racks of servers, the interconnection and aggregation layer and the load balancers plus the border router layer. Thus this workshop by addressing different technologies that could be adapted to any of these three layers, will draw a cartography of potential approaches to effectively reduce the energy consumption of data centres.

16:30-16:45: Introduction, Clint Schow and Dominique ChiaroniAbstract: This first presentation will first describe the energy consumption evolution of data centres in ICT. Different challenges to cover all the segments of a data centre will be then described to introduce the different talks of this workshop.

16:45-17:00: Optical Switching in Data Centres, Prof. George Papen and Prof. George Porter, UCSD, USAAbstract: We discuss the challenges of using optical switching in large-scale datacentres addressing both the physical requirements of the optical switch as well as aspects of the control plane, which must coordinate the optical switching with standard switching technologies such as packet switching.

17:00-17:15: High performance optical circuit switching for software - defined datacentre networks, Dr. Nick Parsons, Polatis Ltd, Cambridge, UKAbstract: DirectLight is a well-established dark fibre optical circuit switch platform offering currently up to 192x192 fibre ports with typical loss and switching speed of 1dB and 20ms, respectively. This talk reviews the performance and scalability of DirectLight for dynamic reconfiguration of the fibre layer in energy-efficient software-defined data centre networks.

17:15-17:30: Highly-Scalable Torus Data Centre Network with Diversified Transmission Schemes, Salah Ibrahim, Toru Segawa, Tatsushi Nakahara, Hiroshi Ishikawa, Atsushi Hiramatsu, Yue-Cai Huang, Ken-ichi Kitayama, and Ryo Takahashi, NTT, Japan Abstract: We review a highly-scalable Torus DC network in which multiple transmission schemes are enabled to support service

12

diversity, where the optical packet, circuit and virtual circuit switching schemes all coexist on the same hardware platform based on the deployment of hybrid optoelectronic routers (HOPRs) and centralized network controller.

17:30-17:45: Scalability of fast silicon photonic switches, Nicolas Dupuis, IBM, USAAbstract: Silicon photonics is an attractive technology for designing low-power and dense footprint photonic switches with nanosecond-scale reconfiguration time. The integration of optical gain into the switch fabric has the potential to improve the scalability of the technology but the optical crosstalk remains a major challenge that needs to be addressed.

17:45-18:00: Hybrid integration of WDM transceivers for short reach applications including inter-DC and intra-DC, Mark Earnshaw, Bell Labs, USAAbstract: Growth of data centres in number and scale is driving demand for higher capacity, higher density and lower cost optical transceivers. WDM offers the potential to dramatically scale the capacity of optical interconnects but breakthroughs are needed in simplifying the cost and complexity of traditional WDM transceivers as used in long-haul and metro telecom networks.

Session 2: Round table on “Research directions for intra data centres”

Chair of the session 2: Dominique Chiaroni, Bell Labs, USA

Abstract: This round table will recall the challenges and the different solutions. The objective of this round table is to exchange with the audience to have a fruitful discussion on this topic and identify some robust directions for photonics in switching.

18:00-18:30: Panelists of the round table: Ibrahim Salah, NTT, Japan; Nicolas Dupuis, IBM, USA; Mark Earnshaw, Bell Labs, USA; Nick Parsons, Polatis, USA; George Papen, UCSD, USA

Conclusion : Main messages of the workshop by Clint Schow, UCSB, USA

14:00-16:00 WS3 - Photonic Switching Systems in support of Spatially and Spectrally Flexible Optical Networking.

Organisers : Ioannis Tomkos, AIT, Greece and Dan Marom, HUJI, Israel Franciabigio room

Workshop Motivation

The traffic carried by core optical networks as well as the per-channel interface rates required by routers are growing at a remarkable pace of typically between 30 and 60% year-over-year. Optical transmission and networking advancements have so far satisfied these traffic requirements by delivering the content over the network infrastructure in a cost and energy efficient manner. However we are approaching fundamental spectral efficiency limits of single-mode fibers and the growth capabilities of conventional WDM networks operating on a fixed frequency grid are quite limited. New optical networking solutions need to be identified to resolve this situation.

Workshop Focus

A large number of significant innovations that are able to offer a capacity increase practically by a factor of around 10-20 (compared to legacy WDM systems at 10 Gb/s on a 50-GHz spacing) have emerged over the last couple of years. Initial efforts targeted innovative modulation/coding techniques and flexible frequency allocations, in an effort to increase the spectral density in optical fiber links, leading eventually to the definition of spectrally flexible/elastic optical networks utilizing optical superchannels together with spectrally flexible/elastic multiplexing schemes (e.g. OFDM and Nyquist WDM), and advanced modulation formats which enable the dynamic and adaptive allocation of end-to-end demands with variable connection characteristics (e.g. requested data rates). However, while the spectrally flexible/elastic super-channel approach can optimize network resources through increased spectral utilization, it has limited growth potential due to the nonlinear Shannon limit imposed on the transport capacity of single-mode optical fiber within the limited gain bandwidth of optical amplifiers. Multi-band amplification

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technologies (e.g., C+L+S-band amplifiers) may yield temporary relief, but the only evident long- term solution to extend the capacity of optical communication systems relies on the use of the spatial domain. The simplest way to achieve spatial multiplexing is to deploy multiple systems in parallel. However, by simply increasing the number of systems, the cost and power consumption also increases linearly. In order to limit the increase in cost and power consumption, component sharing and integration have to be introduced. To this extent, significant research efforts have focused on the development and performance evaluation of few-mode fibers (FMF) and multi-core fibers (MCF), which can be seen as ‘integrated fiber’ media, for space division multiplexed (SDM) systems. This line of work is further supported by the development of integrated optical amplification systems, as well as the significant development efforts in the field of Tb/s integrated transponders for SDM systems. For such systems, the use of spatial superchannels, which are groups of same-wavelength sub-channels that are transmitted on separate spatial modes but routed together, are being investigated.

The vast majority of efforts so far on the aforementioned topics focus on point-to-point transmission systems and not so much on networking aspects. There should be a need for development of novel switching schemes in order to explore the full potential of these spatially and spectrally flexible optical networks. Switching schemes should be able to support joint or independent switching of sub-channels out of spatial and/or spectral super-channels.

Workshop Aim

This proposed PS’15 Workshop aims to provide a forum where experts from all over the world will provide to the audience a comprehensive overview of the state-of-the- art for “Photonic Switching Systems in support of Spatially and Spectrally Flexible Elastic Optical Networking”. The talks will provide information about the current research challenges and directions as well as insights into the projected commercial needs for this emerging scientific area of optical networking. The symposium on these topics is expected to attract many participants who will engage also in lively discussions with the speakers and panelists.

Workshop Speakers

Ioannis Tomkos, AIT, GreeceAntonio D’Errico, Ericsson, ItalyPaul Colbourne, JDSU, CanadaRoberto Proietti, UC Davis, USALiangjia Zong, Huawei, ChinaNicholas Fontaine, Bell Labs, USA, TBCKen Garrett, Finisar, USA, TBCDan Marom, The Hebrew University of Jerusalem, IsraelIkuma Yuichiro, NTT, Japan

16:30-18:30 WS4 - What photonics for 5G? Optical technologies, systems an networks for 5G

Organiser : Fabio Cavaliere, Ericsson, ItalyFranciabigio room

16:30-16:36 Introduction, Fabio Cavaliere, Ericsson, Italy

16:36-16:48 Impact of 5G environment on operators optical infrastructures and equipment, Alessandro Percelsi, Telecom Italia, Italy

With respect to the 3G/4G monolithic design focused on mobile broadband with defined and static connection requirements, the 5G network architecture is expected to be very flexible to efficiently support a lot of use cases with different needs. Operators and vendors are looking for flexible and software-defined configuration of all networking elements included in the RAN and packet core network, to provide such a diversity with reasonable cost. The NFV and SDN approach used in the data-centres should be adapted to the optical transport network, where new optical technologies like flex-transceivers and on-demand connection setting could be used to provide an unified agnostic transport for different services of the 5G environment. Reusing and sharing of optical infrastructures and accommodating the legacy mobile solutions are also mandatory for operators

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16:48-17:00 Flexible and cost efficient optical 5G transport networks Prof. Lena Wosinska, KTH Royal Institute of Technology, Sweden

5G mobile communication is seen as the enabler for the networked society where connectivity will be available anywhere and anytime to anyone and anything. The details of 5G are the subject to ongoing research and debate, mostly focused on understanding radio technologies that can enable the 5G vision, while the implications on transport is not widely considered yet. However, with continued site densification and with growing number of different services to be provisioned, the role of the transport network, i.e., the backhaul of radio base stations or fronthaul of remote radio units, is becoming more and more crucial. This talk will discuss a number of data plane architectures able to provide a flexible and cost efficient optical transport solution for 5G. A number of architectural options (i.e., all optical vs. intermediate electronic processing, with and without caching) for a 5G-transport network will be compared with the objective of identifying the most promising alternatives in terms of total power consumption and equipment cost.

17:00-17:12 Paul Doolan, Coriant, Germany

17:12-17:24 400Gbs Evolution on IP and Optical Layer, David Bianchi, CISCO, Italy

Readiness, enabling technologies and business case Network optimisation using a flexible bit rate

17:24-17:36 5G and optics: a winning combination, Stefano Stracca, Ericsson, Italy

We are evolving towards the networked society, and 5G will be the driver for that. Setting apart from previous mobile generations, 5G will see photonic technologies and optical networking perform a fundamental role in it, side by side with new radio access technologies, network virtualization functions and cloud solutions in

an closely interdependent structure. This leads to great opportunities and big challenges, forcing to abandon traditional disciplinary and network segment partitioning approaches. Some relevant examples of research activities regarding photonic technologies and optical networking in 5G are presented.

17:36-17:48 Prof. Michael J. Wale, OCLARO, USA

17:48-18:00 Switch to integrated Microwave Photonics, Paulus W.L. van Dijk, Satrax B.V., The Netherlands

Integrated microwave photonics (IMWP) is a novel field in which the fast-paced progress in integrated, on-chip, optics is harnessed to provide breakthrough performances in well-established microwave photonic processing functions, which are traditionally realized using discrete optoelectronic components. A field where IMWP can have a strong impact is the one of Antenna Arrays for 5G networks. Such arrays offer a number of attractive characteristics, including a conformal array profile, electronic beamforming (beam shaping and beam steering), interference nulling and the capability to generate multiple antenna beams simultaneously. In many cases, however, the performance of a phased array is limited by the characteristics of the beamforming network (BFN) used. It is generally desired to realize beamformers with broad instantaneous bandwidth, continuous amplitude, and delay tunability and, at the same time, capable of feeding large arrays. This, however, is very challenging to achieve using only electronics. For this reason, the last few years, an increasing amount of research has been directed to beamforming in the optical domain using, integrated microwave photonics solutions. Apart from Antenna Array applications, opportunities for cost effective use of IMWP in switched delay lines has become feasible due to the continuous improvement of the optical chips, particularly the achieved record-low propagation losses in Si3N4/SiO2-based-chips combined with the high integration density.

18:00-18:30 Panel discussion Fabio Cavaliere, Ericsson, Italy

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Message from the chairmen

We welcome you to the Photonics in Switching Conference, 2015, to be held at Florence, Italy.

The Photonics in Switching Conference addresses all aspects of photonic switching including optical switching technologies, optical components & devices, optical switching functions, optical systems,

optical interconnects, and new architectures and algorithms behind networking and computing systems enabled by optical switching.

In particular, the interplay between optical technologies, systems, networking architectures, and/or computer architectures will be emphasized at this Conference.

This conference has established itself as an important forum for the latest developments in this area.

This year’s programme includes many exciting new topics in photonic switching technologies, subsystems, systems, and networks.

With a strong core of invited talks and many contributed papers from around the globe, PS 2015 will serve as an ideal platform to discuss and to learn about new technological trends.

Waiting for you in FlorenceBen, Luca, and Naoya.

General Chairs

S. J. Ben Yoo, UC Davis, USA Luca Potì, CNIT, Italy Naoya Wada, NICT, Japan

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Technical Programme Committees and Topics

1. Optical Switching Technology & Devices Energy efficiency Data Centre enabling technologies Optical reconfiguration techniques and technologies for

computing systems Optoelectronic and all-optical switching and flip-flops Photonic memory and optical buffers Integrated photonic switching technologies integrating electronic

and photonic functionalities Fast MEMS switches Silicon photonic switching technologies using monolithic and

heterogeneous integration Tunable laser technologies Tunable receiver technologies Tunable filter technologies Nanophotonic metamaterials and devices for switching and

routing All-optical, electronic, and hybrid-optoelectronic technologies

Chair: Prof. Ben Eggleton, CUDOS, University of Sydney, Australia

Members: Antonio Malacarne, Scuola Superiore Sant’Anna, Italy Andrea Melloni, Politecnico di Milano, Italy Arnan Mitchell, RMIT University, Melbourne, Australia Roberto Morandotti, INRS, Canada Dave Moss, RMIT University (deputy chair), Australia Jonathan Klamkin, Boston University, USA Dan Kilper, University of Arizona, USA Alessia Pasquazi, University of Sussex, UK

2. Optical Switching Functions & Building Blocks Data Centre subsystems Optoelectronic and all-optical wavelength conversion technologies Hybrid wavelength conversion technologies Optoelectronic- and all-optical signal processing Optoelectronic- and all-optical label swapping Optoelectronic- and all-optical -code translation and processing Optoelectronic- and all-optical -header recognition Optical grooming and aggregation techniques Photonic memory and optical buffering functionality Optoelectronic and all-optical signal regeneration, impairment

compensation, and performance monitoring Optical receiver pre-processing and signal conditioning Optical pre-compensation and pre-distortion Advanced modulation techniques and coding/decoding

subsystems RF over optical processing and transmission Microwave photonics Comparison of all-optical, electronic, and hybrid-optoelectronic

functionality Burst switching compatible transceiver technology

Chair: Dr. Clint Schow, UCSB, USA

Members: Dan Blumenthal, University of California Santa Barbara,USA Gabriella Cincotti, University of Rome, Italy Giampiero Contestabile, Scuola Superiore Sant’Anna, Italy Odile Liboiron-Ladounceour, McGill University, Canada Shu Namiki, AIST, Japan Robert Norwood, University of Arizona, USA Leif Oxenlowe, Technical University of Denmark, Denmark Takuo Tanemura, University of Tokyo, Japan Kenneth K. Y. Wong, University of Hong Kong, Hong Kong Antonella Bogoni, Scuola Superiore Sant’Anna, Italy

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3. Optical Systems Systems and network performances Photonics in computing systems Optical cross-connects Reconfigurable optical add-drop multiplexers/demultiplexers Photonic packet switching and routers Photonic burst switching routers Photonic circuit switching Optical time domain multiplexed systems Optical multiple access systems (WDMA, TDMA, and CDMA) Parallel data links and space division multiplexing Optical interconnects Optical access systems Optical communications in Data Centres

Chair: Prof. Hiroyuki Uenohara, Tokyo Institute of Technology, Japan

Members: Dominique Chiaroni, ALU, France Dan Marom, Hebrew University of Jerusalem, Israel Gianluca Meloni, CNIT, Italy Francesco Fresi, Scuola Superiore Sant’Anna, Italy Fumio Futami, Tamagawa University, Japan Cyriel Minkenberg, IBM Zurich, Switzerlan Antonio Napoli, Coriant, Germany Jose Azaña, INRS, Canada Chester Shu, Chinese University of Hong Kong, Hong Kong Ryo Takahashi, NTT, Japan Tsuyoshi Konishi, Osaka University, Japan Junya Kurumida, AIST, Japan

4. Optical networking Convergence fixed-mobile networks Migration from fixed to flexi-grid Rapidly reconfigurable networks Software defined optical networks and OpenFlow Optical network control and management Wavelength routing and assignment Physical layer design and control Next-generation GMPLS, ASON, Photonic MPLS, OpenFlow Software defined networking for photonic systems Optoelectronic label switching networks IP-over-optical architectures Energy efficient architectures and algorithms Cross-layer architectures and algorithms Application-aware and service-oriented architectures Converged mobile and optical networks Optical network testbeds and field trials Optical access and aggregation networks High-performance data server, computing networks and Data Centres

Chair: Prof. Ioannis Tomkos, Athens Information Technology Centre, Greece

Members: Dimitrios Klonidis, AIT, Greece Domenico Siracusa, CreateNet, Italy Konstantinos Kanonakis, NEC, USA Steven Shen, Soochow University, China Annalisa Morea, Alcatel-Lucent, Italy Nicola Sambo, Scuola Superiore Sant’Anna, Italy Roberto Proietti, UC-Davis, USA Yvan Pointurier, Bell Labs, Alcatel-Lucent, France Eleni Palkopoulou, Cisco, USA Jiajia Chen, KTH, Sweden George Ellinas, University of Cyprus, Cyprus

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9:30-10:10The strategic role of optical technology in the Networked SocietySandor Albrecht, Ericsson Research, Sweden

Abstract: We are on the brink of an extraordinary revolution that will change our world forever. In this new world, called the Networked Society, everyone, everything and everywhere will be connected in real time. The way we innovate, collaborate, produce, govern and achieve sustainability will be fundamentally

changed. To achieve this, not only the entire population of the planet but tens of billion devices, with a plethora of requirements associated to the different services will be connected. The network will serve as a common platform for all kinds of activities, as well as a foundation for innovation and transformation.This will put extreme demand on the network: a massive growth of traffic volume and huge number of connected devices with a wide range of requirements and characteristics. To achieve this, optical technology is expected to play a crucial role. While nowadays optical technologies are mostly considered in the metro and backbone segments of the network, in the future it will be key in other segments, e.g. access, closer to antennas, fronthaul or the data centre interconnections. Moreover, optical will play a key role in interconnection of systems, rack-to-rack, board-to-board and chip-to-chip, which will have to reach huge level of data

processing at lower cost, footprint and power consumption.In this talk, we describe the requirements of the Network Society and give examples of new optical solutions and photonics technologies to assure connectivity with the desired level of performance, characteristics and costs.

Biography: Sandor Albrecht received his M.Sc.E.E. and Ph.D. from Budapest University of Technology and Economics in 1993 and 2004, respectively. He also received a M.A.Sc. from the University of British Columbia, Vancouver, BC, Canada in 1998 and a MBA from Central European University Business School, Budapest, Hungary in 2009. Between 1993 and 1998, he participated in several digital signal processing and radar imaging related research and development project as a researcher and software developer in Hungary and Canada. He joined Ericsson in Hungary in 1999, where he worked as a manager leading software development projects and departments. He was responsible for four different product development areas, such as SmartEdge (Multi-Service Edge Router), Mobile Media Gateway, IMS Gateway and Telephony Softswitch Gateway Controller. He moved to Stockholm in 2010 and joined the IP and Broadband Design Unit. His main responsibility was to define and manage the Ericsson wide technology strategy for IP and packet transport evolution. Since March 2013, he is the Director of IP and Transport at Ericsson Research. His area of interest covers optical HW and networking, small cell transport, Xhaul solutions, network programmability, 5G Transport, and high performance data plane related research.

Technical Programme

Plenary SessionWednesday - September 23 - Time 9:30-11:30

Chairmen: Ben Yoo, Luca Potì, Naoya Wada

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10:10-10:50Optical Interconnects and Computing of the Future: Point of View in Lasers and Photonic Integrated CircuitsMatsuo Shinji, NTT, Japan

Abstract: The electrical power consumed in data transmission systems is now hampering efforts to further increase the speed and capacity at various scales, ranging from microprocessors, servers, and routers to data centres. Optical interconnects employing an ultralow energy directly modulated

lasers will play a key role in reducing the power consumption. Since a laser operating energy is proportional to the size of its cavity, developing high-performance lasers with a small cavity is important. For this purpose, we have developed membrane DFB and photonic crystal (PhC) lasers with a buried heterostructure (BH). Thanks to the reduction of cavity size and the increase in optical confinement factor, we have achieved extremely small operating energy of less than 5 fJ/bit with a PhC wavelength-scale cavity. Heterogeneous integration with Si photonics devices is also important because device fabrication using Si CMOS technologies is promising for reducing device cost. Furthermore, to construct high-capacity and cost- efficient photonic networks in datacom and computercom, wavelength division multiplexing (WDM) technologies are strongly required because a flexible network can be constructed.Here we review recent progress in this field, focusing on ultralow-power-consumption directly modulated lasers and their photonic integrated circuits. We also describe progress in heterogeneous integration of these lasers and Si photonics devices. This will put extreme demand on the network: a massive growth of traffic volume and huge number of connected devices with a wide range of requirements and characteristics. To achieve

this, optical technology is expected to play a crucial role. While nowadays optical technologies are mostly considered in the metro and backbone segments of the network, in the future it will be key in other segments, e.g. access, closer to antennas, fronthaul or the data centre interconnections. Moreover, optical will play a key role in interconnection of systems, rack-to-rack, board-to-board and chip-to-chip, which will have to reach huge level of data processing at lower cost, footprint and power consumption.In this talk, we describe the requirements of the Network Society and give examples of new optical solutions and photonics technologies to assure connectivity with the desired level of performance, characteristics and costs.

Biography: Shinji Matsuo has been researching photonic functional devices as a Senior Distinguished Researcher in NTT Device Technology Laboratories.Dr. Matsuo received his B.E. and M.E. degrees in electrical engineering from Hiroshima University, Hiroshima, Japan, in 1986 and 1988, and the Ph.D. degree in electronics and applied physics from Tokyo Institute of Technology, Tokyo, Japan, in 2008.In 1988, he joined NTT Opto-electronics Laboratories, Atsugi, where he was engaged in research on photonic functional devices using MQW-pin modulators and VCSELs. In 1997, he researched optical networks using WDM technologies at NTT Network Innovation Laboratories, Yokosuka. Since 2000, he has been researching InP-based photonic integrated circuits including fast tunable lasers, photonic crystal lasers, and heterogeneously integrated lasers on Si at NTT Photonics Laboratories and NTT Device Technology Laboratories, Atsugi.Dr. Matsuo received the Izuo Hayashi Award from the Japan Society of Applied Physics (JSAP) for recognition of his pioneering research on photonic-electric integration technologies in 2013. He is a member of the IEEE, JSAP and the Institute of Electronics, Information and Communication Engineers (IEICE) of Japan.

Technical Programme Committees Wednesday - September 23 - Plenary Session

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10:50-11:30Large-Scale Integrated Classical and Quantum Photonics for High-Performance SwitchingRay Beausoleil, Hewlett-Packard Company, USA

Abstract: Moore’s Law has set great expectations that the performance/price ratio of commercially available semiconductor devices will continue to improve exponentially at least until the end of this decade. Although the physics of nanoscale silicon transistors alone could allow these expectations to

(almost) be met, the physics of the metal wires that connect these transistors places stringent limits on the performance of integrated circuits. We will describe a Si- compatible global interconnect architecture – based on chip-scale optical wavelength division multiplexing – that could precipitate an “optical Moore’s Law” and allow exponential performance gains until the transistors themselves become the bottleneck. Based on similar fabrication techniques and technologies, we will also present quantum approaches to optically-coupled information processors for computation beyond Moore’s Law. First, we will briefly review our recent results demonstrating the optical coupling of nitrogen-vacancy color centres to single-crystal diamond resonators, allowing enhancement of the zero-photon transition rate by a factor of 70. This is a first critical step towards large-scale integrated diamond quantum optical networks, but scaling remains a formidable challenge for the development of practical applications of quantum information technology for

commercial utilization. Second, it may be possible to harness devices with explicitly quantum coherent behavior to perform reliable classical computations using quantum feedback control. As an initial step toward this goal, we have demonstrated ultrafast switching in microscale nonlinear optical devices fabricated in amorphous silicon and gallium arsenide, and we have developed a semi-quantum photonic circuit simulator to guide us as we layout photonic circuits with hundreds of coherently interacting elements.

Biography: Ray Beausoleil is an HP Fellow in Systems Research at HP Laboratories, and a Consulting Professor of Applied Physics at Stanford University. At HP, he leads the Large-Scale Integrated Photonics research group, and is responsible for research on the applications of optics at the micro/nanoscale to high-performance classical and quantum information processing. His current projects include photonic interconnects for exascale computing, and low-power complex nanophotonic circuits. Ray received the Bachelor of Science with Honors in Physics from the California Institute of Technology in 1980; the Master of Science degree in Physics from Stanford University in 1984; and his Ph.D. in Physics from Stanford in 1986 as a member of Ted Hansch’s research group. In 1996, Ray became a member of the technical staff at HP Laboratories. Among his early accomplishments at HP, he invented the optical paper-navigation algorithms incorporated into the HP/Agilent optical mouse, and now HP’s large-format printers. He has published over 300 papers and conference proceedings and five book chapters. He has over 100 patents issued, and over three dozen pending. He is a Fellow of the American Physical Society.

Wednesday - September 23 - Plenary SessionTechnical Programme Committees

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WeI112:00-13:00SC1 Photonic Integrated CircuitsChairman: Jonathan Klamkin, UCSB, USA

12:00 WeI1 - 1 Feedback-controlled tuning, switching, and locking of photonic integrated circuits (invited) Francesco Morichetti1; Andrea Annoni1; Stefano Grillanda1; Marco Carminati1; Pietro Ciccarella1; Giorgio Ferrari1; Marco Sampietro1; Andrea Melloni1; Michael J. Strain2; and Marc Sorel3

1: Politecnico di Milano, Italy; 2: The University of Strathclyde, Glasgow, UK; 3: University of Glasgow, UKAbstract: The CLIPP technology enabling non-invasive onchip monitoring of the light intensity is exploited to realize feedback controlled schemes for the tuning, switching, and locking of photonic integrated circuits. Applications to photonic architectures based on silicon photonic microring

WeII112:00-13:00SC3 Optical technologies for future photonic networksChairman: Ryo Takahashi, NTT, Japan

12:00 WeII1 - 1 What is the right physical layer model for a highly dynamic reconfigurable optical network? (invited) Pierluigi Poggiolini1; Andrea Carena1; Yanchao Jiang1; Fabrizio Forghieri2; Rosanna Pastorelli2

1: Politecnico di Torino; 2: Cisco Photonics Italy srlAbstract: We investigated the variability of non-linearity generation in dynamically-reconfigurable network scenarios with re-routing, non-homogenous formats and variable accumulated dispersion among channels. Based on the results, we discuss practical modeling options fore real-time physical-layer awareness in dynamically reconfigurable networks.

12:30 WeII1 - 2 Time Frequency Packed DP-QPSK Superchannel Field Trial Transmission over Installed LinkGianluca Meloni,

CNIT, ItalyAbstract: Time frequency packing technique was demonstrated in a superchannel field trial transmission over long-haul distances. The technique allows a high spectral efficiency even with low order modulation formats. The transmission was successfully performed on an installed link between Milan and Finkenstein (Austria) in a loop back configuration, which included 2x660km of ITU-T G.655 fiber. The superchannel is composed by eight subchannels with low-level modulation format, i.e. polarization multiplexed (PM)-quadrature phase shift keying (QPSK). The use of low order modulation format guarantee better robustness in terms of optical signal to noise ratio (OSNR) and reduced complexity with respect to higher order formats. Coherent detection was used together with iterative maximum a posteriori probability

WeIII112:00-13:00SC4 The Evolution of Optical NetworksChairman: Roberto Proietti, University of California, Davis, USA

12:00 WeIII1 - 1 A Vision Towards Smart Photonic Cloud (invited) Ken-Ichi KitayamaOsaka University, JapanAbstract: A vision of the photonic network in 2020+, which envisages a “Smart Photonic Cloud (SPC)” is presented. Three “Ss” key enabling technologies relevant to SPC, namely scale-free photonics, smart photonic networking, and a synthetic transport platform are proposed.

12:30 WeIII1 - 2 Electrical v/s Optical Aggregation in Multi-layer Optical Transport Networks (invited) Gilles Thouenon1; Christophe Betoule1; Pouria Sayyad Khodashenas2; Jose Manuel Rivas2; Dimitrios Klonidis2; Esther Le Rouzic1; Erwan Pincemin1

1: Orange Labs, France; 2: Athens Information Technology (AIT),

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resonators and Mach-Zehnder Interferometers are presented.

12:30 WeI1 - 2 Silicon Photonic Integrated Circuits for WDM applications (invited) Po DongBell Labs, USAAbstract: We discuss silicon photonic integrated circuits to enable large-capacity wavelength-division multiplexing (WDM) applications. Both the challenges and possible solutions are illustrated with several demonstrated devices.

(MAP) detection and decoding at the receiver. A 992Gb/s PM-QPSK superchannel was successfully transmitted between Milan-Finkenstein-Milan with a spectral efficiency (SE) of 6.2bit/s/Hz. Long term measurements confirm the system reliability.

12:45 WeII1 - 3 Impact of spatial channel skew on the performance of spatial-division multiplexed self-homodyne transmission systemsRuben S Luís1; Benjamin J Puttnam2; Jose Manuel Delgado Mendinueta2; Yoshinari Awaji2; Naoya Wada2

1: Infinera, USA, 2: NICT, JapanAbstract: This paper presents and experimentally validates an analytical model of the impact of signal and pilot tone (PT) skew in spatial-division multiplexing self-homodyne detection systems. It is shown that the novel model describes accurately the variance of the residual phase noise due to non-zero signal-PT skew as a function of the block length of the carrier phase recovery mechanism and linewidth of the transmission laser.

GreeceAbstract: With optical technology evolution, it becomes possible to perform all optical traffic grooming (AOTG) with a very fine granularity. In the context of flexible optical networking, AOTG paves the way to new possibilities in future transport networks. Finding the best trade-off between electrical and optical aggregation in intrinsically multi-layer transport networks is a complex challenge for operators. This paper compares CAPEX results and resource fill-in performances of electrical and optical aggregation solutions, through a real multi-layer transport network case study.

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WeI214:30-16:00SC1 WDM Silicon devicesChairman: Francesco Morichetti, Politecnico di Milano, Italy

14:30 WeI2 - 1 Novel multimode interference devices for wavelength beam splitting/combining (invited) Keisuke Kojima and Toshiaki Koike-AkinoMitsubishi Electric Research Laboratory, USAAbstract: This paper reviews our recent device design activities on wavelength splitters/combiners. We start with blind optimization of MMIs having rectangular patches, and then based on the physical insight, the device structures are simplified to achieve even better performance. This methodology is applied to low insertion loss for two- and four-wavelength splitters/combiners, and it can be applied to other types of devices.

15:00 WeI2 - 2 A 200-GHz Spacing, 17-Channel, 1x2 Wavelength Selective Switch using a Silicon Arrayed-Waveguide Grating with LoopbackHideaki Asakura1; Takemasa Yoshida1; Hiroyuki Tsuda1; Keijiro Suzuki2; Ken Tanizawa2; Munehiro Toyama2; Minoru

WeII214:30-16:00SC3 Optical signal processingChairman: Hiroyuki Uenohara, Tokyo Institute of Technology, Japan

14:30 WeII2 - 1 Maximizing Spectrum Utilization of Optical Networks through Intelligent Wavelength Defragmentation (invited) Yutaka Takita; Kazuyuki Tajima; Tomohiro Hashiguchi; Toru KatagiriFujitsu Limited, JapanAbstract: We introduce ILP-based wavelength defragmentation approach which enables maximum spectrum efficiency. This approach can be enhanced to consider migration process with a bridge and roll manner. Through simulation, we demonstrate the effectiveness of our approach from the viewpoint of resource efficiency and migration process in defragmentation.

15:00 WeII2 - 2 Experimental Comparison of 1.28 Tb/s Nyquist WDM vs. Time-Frequency PackingTalha Rahman1; Antonio Napoli2; Francesco Fresi3; Luca Potì4; Gianluca Meloni4; Nicola Sambo3; Markus Noelle5; Colja Schubert5; Chigo Okonkwo1; Marc Bohn2; Huug de Waardt1

1: TUE, The Nederlands; 2: CORIANT, Germany; 3: SSSUP, Italy; 4 CNIT, Italy; 5: HHI, GermanyAbstract: We experimentally compared

WeIII214:30-16:00SC2 Optical signal processing and Wavelength ConversionChairman: Nicolas Dupuis, IBM T. J. Watson Research Centre, USA

14:30 WeIII2 - 1 High speed processing of complex-modulation signals based on time-domain holography (invited) Maria R. Fernandez-Ruiz and Jose AzañaINRS, CanadaAbstract: We review recent work on electro-optical and alloptical techniques for generation, detection and processing of arbitrary complex-field optical signals based on time-domain holography. These techniques rely on intensity-only detection and modulation, greatly simplifying previous approaches for the management of complex (amplitude and phase) information.

15:00 WeIII2 - 2 High speed processing of complex-modulation signals based on time-domain holographySepideh Naimi; Sean O’Duill; Liam BarryDublin City University, IrelandAbstract: We present results of all-optical wavelength conversion of a 1.008 Tb/s 6×28 Gbaud Nyquist-WDM superchannel based on 64-QAM using four-wave mixing in in a semiconductor optical amplifier. We employ the phase noise tolerant dual-correlated pumping scheme to eliminate

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Ohtsuka2; Nobuyuki Yokoyama2; Kazuyuki Matsumaro2; Miyoshi Seki2; Keiji Koshino2; Kazuhiro Ikeda2; Shu Namiki2; Hitoshi Kawashima2

1: Keio University, Japan; 2: AIST, JapanAbstract: A 200-GHz spacing, 17-channel, 1x2 wavelength selective switch was fabricated using silicon wire waveguides. An arrayed-waveguide grating with loopback is used to configure the 1x2 wavelength selective switch. The chip size was only 2.8 mm x 6.5 mm. The minimum and the maximum losses of the wavelength selective switch were 21 dB and 26 dB, respectively. The minimum and the maximum crosstalks were -21 dB and -2 dB, respectively.

15:15 WeI2 - 3 Performance Simulation of Novel Silicon Cross-Waveguide Reflection-Type Optical SwitchYusuke Shimada1; Yuji Fujiwara1; Atsushi Matsumoto2; Atsushi Ishikawa1; Hiroshi Ishikawa3; Yuichi Matsushima1; Katsuyuki Utaka1

1: Waseda University, Japan; 2: NICT, Japan; 3: AIST, JapanAbstract: We proposed a novel silicon cross-waveguide reflection-type optical switch. Performance simulation was carried out to show a low crosstalk of about -25dB. We actually fabricated the device to exhibit fundamental

terabit transmission employing 16QAM Nyquist WDM and QPSK Time-Frequency Packing. The two modulation schemes have been transmitted over the same link configuration. The latter showed slightly better performance in terms of spectral efficiency and reach, at the expense of a more expensive and complex hardware

15:15 WeII2 - 3 Cyclic Prefix Insertion for All-optical Fractional OFDMTomotaka Nagashima1; Gabriella Cincotti2; Takuya Murakawa1; Satoshi Shimizu3; Makoto Hasegawa1; Kunihiro Hattori4; Masayuki Okuno4; Shinji Mino4; Akira Himeno4; Naoya Wada3; Hiroyuki Uenohara5; Tsuyoshi Konishi1

1: Osaka University, Japan; 2: University Roma tre, Italy; 3: NICT, Japan; 4: NTT Electronics, Japan; 5: Tokyo Institute of Technology, JapanAbstract: We verify an insertion effect of cyclic prefix for reduction of inter channel interference in all-optical fractional OFDM system. Since fractional OFDM has an intermediate characteristic between OFDM and Nyquist-OTDM, a certain degree of effect of cyclic prefix is expected in fractional OFDM. The results of bit error rate measurement of a 4×10 Gbit/s DBPSK all-optical fractional OFDM system show that cyclic prefix improves the signal quality under an insufficient time gate condition.

15:30 WeII2 - 4 FBG- and AWG-based AO-OFDM demultiplexingJulian Hoxha1; Gabriella Cincotti1; Satoshi

phase noise transfer from the pumps to the converted 64-QAM superchannel and thus achieving minimal implementation OSNR penalty of 2.5 dB.

15:15 WeIII2 - 3 Wavelength Conversion of PDM 16-QAM Signals by Four Wave Mixing with a Co-Phase Dithered PumpMark Pelusi1; Karen Solis-Trapala2; Hung Nguyen Tan2; Takashi Inoue; Shu Namiki2

1: University of Sydney, Australia; 2: AIST, JapanAbstract: We demonstrate broadband wavelength conversion of a 256 Gb/s PDM 16-QAM signal using degenerate four-wave mixing (FWM) pumped by a single CW laser. By co-phase dithering both pump and signal, the FWM conversion efficiency is enhanced by 12 dB to ~47%, while suppressing most dither transfer to the idler, enabling the demodulation of the signal with a bit error rate below the 4.5x10-3 threshold limit for forward error correction with 7% overhead, and with an OSNR penalty of 1.5 dB compared to the back-to-back reference.

15:30 WeIII2 - 4 Impact of Inter-Core Crosstalk on the Transmission Distance of QAM Formats in Multi-Core FibersBenjamin J Puttnam1; Ruben S Luís2; Tobias A. Eriksson3; Werner Klaus1; Jose Manuel Delgado Mendinueta1; Yoshinari Awaji1; Naoya Wada1

1: NICT, Japan; 2: Infinera, USA; 3: Chalmers

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switching operation.

15:30 WeI2 - 4 A Wavefront Control Type Compact Silicon Wavelength Selective SwitchKyosuke Muramatsu; Hiroyuki TsudaKeio University - JapanAbstract: We designed a 200-GHz spacing, 20-ch, 1x4 wavefront control type Si wavelength selective switch. The device size was only 5070x4032 µm2. The configuration has no waveguide crossings regardless of the number of output ports and wavelength channels, which is a very important feature in silicon wire waveguide-based optical devices.

15:45 WeI2 - 5 8×128 adWSS For CDC ROADMYun Yan; Han Zhao; Liangjia Zong; Zhi FengHuawei Technologies, ChinaAbstract: A novel integrated 8× 128 adWSS module was proposed. The adWSS optical system was designed and simulated. Results indicate that the proposed adWSS could be applied in CDC ROADM.

Shimizu2; Naoya Wada2

1: University Roma Tre, Italy; 2: NICT, JapanAbstract: An experimental comparison of all optical- orthogonal frequency division multiplexing (AO-OFDM) transmission is presented, using at the receiver either a fiber Bragg grating (FBG) or an arrayed waveguide gratings (AWG) . System performances are analyzed, without dispersion compensation or optical time gating.

15:45 WeII2 - 5 Experimental Demonstration of Flex-Grid udWDM with 6.25GHz Full-Duplex Frequency Slots for Metro/Access & Data CentresJosé A Altabás1,2; David Izquierdo1; Jose A Lazaro1; Adolfo Lerin1; Felix Sotelo2; Salvatore Spadaro1; Gabriel Junyent1; Ignacio Garcés2

1: UPC, Spain; 2: University of Zaragoza, SpainAbstract: Flex-Grid 6.25GHz full-duplex frequency slots are proposed for Metro/Access & Data-Centre Networks allocating: 1Gbps Nyquist-DPSK over MZM for OLT/DC-ONU downlinks and OLT/DC up-downlinks; 1Gbps NRZ-DPSK over directly modulated DFB for ONU-OLT/DC uplinks; with 50km single fiber transmission.

University of Technology, SwedenAbstract: We investigate the transmission distance of three QAM modulation formats, in the presence of inter-core crosstalk in a 7-core fiber. We show that crosstalk limits transmission distance for all formats with a greater impact on higher order modulation formats. For a crosstalk level equivalent to equal signal launch power in each core, we measure a reduced transmission distance at BER=1.5x10-2 of 17%, 23% and 36% for PDM-QPSK, PDM-16QAM and PDM-64QAM respectively.

15:45 WeIII2 - 5 An Integrated and Pre-Amplified Demodulator for 56 Gb/s WDM-DPSK SignalsGiampiero Contestabile; Philippe Velha; Nicola AndriolliSSSUP, ItalyAbstract: We demonstrate an InP-integrated WDM-DPSK demodulator encompassing a semiconductor optical pre-amplifier. The demodulator is based on ad-hoc optical filtering by an arrayed waveguide grating. Preliminary experimental results demonstrating operation at 56 Gb/s are reported.

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WeI316:30-18:00SC1 Photonic-crystals and wires devicesChairman: Po Dong, Bell Labs, USA

16:30 WeI3 - 1 Ultrafast low-energy all-optical switching using a photonic-crystal asymmetric Fano structureYi YuDTU, DenmarkAbstract: We experimentally demonstrate 20 Gbit/s alloptical switching with low-energy consumption using a simple and ultra-compact InP photonic-crystal structure by employing a well-engineered Fano resonance in combination with broken mirror symmetry.

16:45 WeI3 - 2 Towards Faster InP Photonic Crystal All-Optical-GatesGregory Moille; Alfredo De Rossi; Sylvain CombrieThales Research & Technology, FranceAbstract: We demonstrated a two-fold acceleration of the fast time constant characterising the recovery of a P-doped Indium-Phosphide Photonic Crystal all-optical gate. Time-resolved spectral analysis is compared with a three-dimensional drift-diffusion model for the carrier dynamics, demonstrating the transition from the ambipolar to the faster minority carrier dominated diffusion regime. This open the perspective for faster yet efficient nanophotonic all-optical gates.

17:00 WeI3 - 3 Polarization-Diversity 4 x 4 Si-Wire Optical Switch

WeII316:30-18:00SC3 ROADM technologiesChairman: Maria del Rosario, INRS, Canada

16:30 WeII3 - 1 Wavelength Selective Switches supporting Multiple Spatial Modes (invited) Nicolas K. FontaineALU, USAAbstract: Future space-division multiplexed optical networks will require wavelength routing elements that can switch spatial channels in addition to wavelength channels. We describe techniques to build WSSs that can switch multiple spatial modes without requiring additional switching capacity and without introducing mode-dependent losses.

17:00 WeII3 - 2 Highly Scalable and Compact ROADM Architecture that Exploits MxN Wavelength-Selective SwitchesMasaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi SatoNagoya University, JapanAbstract: We propose a highly scalable and compact ROADM architecture that uses multiple MxN WSSs as subsystems. The effectiveness of our scheme is verified via a hardware-cost

WeIII316:30-17:45SC4 Optical Network ArchitectureChairman: Nicola Calabretta, COBRA Research Institute, The Nederlands

16:30 WeIII3 - 1 Time and Spectral optical Aggregation for Seamless Flexible Networks (invited) Paulette Gavignet1; Esther Le Rouzic1; Erwan Pincemin1; Lida Sadeghioon2; Bing Han1; Mengdi Song1

1: Orange Labs Networks, France; 2: FOTON Lab, FranceAbstract: Sub-wavelength switching solutions offer an efficient way of improving the use of network resources. Advantages and limitations are discussed and a new solution (TISA: TIme and Spectral optical Aggregation) is proposed that allows realizing transparent seamless flexible networks.

17:00 WeIII3 - 2 Mixing of Dedicated Waveband and Shared Waveband Assignment in Heavily Loaded OPCI Networks after DisasterSugang Xu; Masaki Shiraiwa; Yoshinari Awaji; Naoya WadaNICT, JapanAbstract: Multiwavelength optical packet and circuit integrated (OPCI) networks featured by the agile wavelength resource adjustment have been developed. With quick

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Keijiro Suzuki; Ken Tanizawa; Sang-Hun Kim; Satoshi Suda; Guangwei Cong; Kazuhiro Ikeda; Shu Namiki; Hitoshi KawashimaNICT - JapanAbstract: We present a polarization-diversity 4 x 4 silicon-wire optical switch on a 2.1 x 1.1 mm2 die, which employs the TE and TM components but no polarization rotator for simple fabrication. The switch exhibited 12.5 dB on-chip loss, 1.9 dB PDL, and ~10 ps DGD.

17:15 WeI3 - 4 Concurrently Establishing and Removing Multi-Wavelength Channels Reconfiguration SystemMasaki Shiraiwa; Hideaki Furukawa; Takaya Miyazawa; Yoshinari Awaji; Naoya WadaNICT, JapanAbstract: We propose a novel wavelength resource reconfiguration system for a dynamic and agile new-generation optical switching network such as a high-speed elastic optical network. The system can remove the wavelength channels in time of 1 / (the number of the channels multiplied by 3) compered with conventional method. A proof of concept employing flexible-grid wavelength selective switches and our unique technology burst-mode erbium-doped fiber amplifier demonstration achieved 1 / 12 time in case of removing four-wavelength channels without degradation of the transmission signals quality.

17:30 WeI3 - 5 Empirical Multichannel Power Consumption Model for Erbium-Doped Fiber Amplifiers

assessment, routing-performance simulations, and transmission experiments for the first time.

17:15 WeII3 - 3 Optical Multi-cast Multi-pole Multi-throw Switch Using Holography and Its Application to 2-degree ROADM NodeKeita Yamaguchi; Joji Yamaguchi; Kenya Suzuki; Yuichiro Ikuma; Mitsumasa Nakajima; Toshikazu Hashimoto; Mikitaka ItohNTT, JapanAbstract: We propose an optical multi-cast multi-pole multi-throw switch that routes multiple optical signals with a single knob control with a simple optical configuration. A 2-degree ROADM node is demonstrated as an application of the proposed optical switch.

17:30 WeII3 - 4 Mode-unbundled ROADM for MDM Networks: Characterization of Uni- and Bi-directional Mode AssignmentNikolaos Panteleimon Diamantopoulos1; Masahiro Hayashi1; Yuki Yoshida1; Akihiro Maruta1; Katsuhiro Takenaga2; Hitoshi Uemura2; Matsuo Shoichiro2; Ken-ichi Kitayama1

1: Osaka University, Japan; 2: Fujikura, Japan

adjustment of wavelength resource, e.g., in emergency cases like disasters, the capacity of optical packet switching (OPS) portion of OPCI network where is closed to the disaster area can be extended quickly first so as to accommodate the significantly increased packet traffic. Here, we are motivated to investigate the efficient way for taking advantage of the emergently extended wavelength resource (for OPS) in the most congested part of the OPCI core network (i.e., outside of but close to the disaster area). In this paper we propose a waveband (WB) assignment scheme for multiwavelength-based OPS network which mixes the dedicated WBs and shared WBs assignment to isolate the heavy traffic flows as many as possible, and minimize the packet congestion efficiently. Simulation results reveal that our proposal can significantly reduce the packet loss, hence enhance the robustness of OPCI networks in emergency situations.

17:15 WeIII3 - 3 Cost Effective and Resilient Optical Network that Offers Seamless Network Expansion via Subsystem Modular OXCs and Inter-node Interconnection OptimizationKosuke Sato; Hiroshi Hasegawa; Ken-ichi Sato

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Silvia Saldaña Cercós1; Getulio de Paiva2; Marcio Colazza Argentato3; Juliano Rodrigues Fernandes de Oliveira3; Anna Manolova Fagertun1; Idelfonso Tafur Monroy1 1: DTU, Denmark; 2: Research and Development Centre in Telecommunications, Brazil; 3: CPqD, BrazilAbstract: In this paper we report on the first experimental power consumption analysis and model of single and multi-stage booster erbium-doped fiber amplifiers (EDFAs) with automatic gain control (AGC), accounting for channel number dependency. Results show that the amount of channels being amplified simultaneously contributes significantly, up to 48%, to the total power consumption due to the circuitry used for controlling the EDFA. As the number of simultaneous amplified WDM channels in high capacity long and medium reach transmission links reflects closely traffic patterns generated by end-users, it is relevant to study channel number dependent power consumption for devising EDFA power efficient control and design.

17:45 WeI3 - 6 A wide range optical amplification in 1.3 - 1.5 micron with Bi-doped silica fiberS. Kobayashi and M. TakahashiChitose Institute of Science and Technology, JapanAbstract: In this report the Bi-doped silica fiber (BDF) is fabricated by the vapor-phase axial deposition (VAD) method. A wide range optical amplified gain is measured in 1.3-1.5 µm with the BDF. 7dB gain is achieved with 4m D-shaped first-clad fiber at 1310 nm.

Abstract: A mode-unbundled ROADM, composed of fiber- based mode-mux/demux and a multi-port MEMS switch, is proposed for MDM networks. The experimental demonstration was performed in single- and two-node configurations, for uni- and bi-directionally mode assigned QPSK and 16-QAM signals, without MIMO DSP.

17:45 WeII3 - 5 Novel ROADM architecture including optical equalization for metro-regional networksAntonio MalacarneSSSUP, ItalyAbstract: A novel ROADM architecture based on separation of odd and even channels and programmable optical spectral shaping is proposed and compared with existing alternatives. The main design parameters are optimized through numerical analysis. Experimental validation of BER performance improvement with respect to conventional route-and-select architecture is demonstrated in a metro-regional scenario. In particular Nyquist 20GBaud dual-polarization QPSK signals in a WDM 25GHz grid are considered, showing an increase of the number of traversed nodes from 6 to 8

Nagoya University, JapanAbstract: An optical network that is cost-effective, resilient, and capable of disruption-free expansion is developed. It consists of subsystem modular OXCs and inter-node interconnection optimization. Significant hardware scale reduction and seamless capacity expansion are shown to be achieved. With the optimization technique introduced in this paper, the fiber number increment imposed by the reduced routing capability stemming from subsystem decomposition and resiliency with dedicated path protection is successfully kept to a minimum.

17:30 WeIII3 - 4 Optical Deep Packet Inspection with Data rate Reduction for High Speed Transmission SystemsEmma LazzeriSSSUP & CNIT, ItalyAbstract: In this paper, we propose, for the first time to the best of our knowledge, a novel approach to realize Deep Packet Inspection (DPI) exploiting fast optical subsystems aided by low cost slow rate electronics, to extract the desired header fields and slow down the signal rate to deliver the selected information to the electronic processing at a suitable low rate speed.

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ThI19:00-10:30SC1 Multi-tone multi-wavelength generationChairman: Keisuke Kojima, Mitsubishi Electric Research Laboratory, USA

9:00 ThI1 - 1 Practical considerations on discrete Multi-tone transmission for cost-effective access networks (invited) Radan Slavík; Zhixin Liu; David J RichardsonUniversity of Southampton, UKAbstract: The Discrete Multi-Tone (DMT) signal format is becoming increasingly attractive for short distance optical communications applications, such as inter-data centre interconnection and within optical access networks, due to its high spectral efficiency and capability of adapting to impairments (e.g. high-frequency roll-off in modulation response and fibre chromatic dispersion-induced frequency-dependent signal fading). Enabled by novel laser technologies and powerful digital signal processing (DSP), direct-modulation direct-detection (DM-DD) systems using the DMT format offer unprecedented capacities with minimum optical hardware.

ThII19:00-10:30SC3 Transmission systems and devicesChairman: Dan Marom, Hebrew University of Jerusalem, Israel

9:00 ThII1 - 1 High-Capacity Photonic Integrated Circuits in High Performance Cloud, Metro & Long-Haul Applications (invited) Mehrdad Ziari; Peter Evans; Vikrant Lal; Scott Corzine; Tim Butrie; Mark Missey; Don Pavinski; Joseph Summers; Pavel Studenkov; Thomas Vallaitis; Matthias Kuntz; Forrest Sedgwick; Han Sun; Jeff Rahn; Vince Dominic; Philipp Schindler; Rene Schmogrow; Saurabh Kumar; Kevin Croussore; Pierre Mertz; Jie Tang; Amir Hosseini; Huan-Shang Tsai; Jacco Pleumeekers; Matthew Fisher; Parmijit Samra; Matthew Mitchell; Kuang-Tsan Wu; Steve Grubb; Stu Elby; Mike Reffle; Fred Kish; Dave WelchInfinera, USAAbstract: The development of large scale Photonic Integrated Circuits and integration into high capacity optical module and the performance in a variety of data-centre or metro and long-haul coherent optical link applications will be presented.

9:30 ThII1 - 2 Adaptive Subcarrier Multiplexing Maximizing the Performance of a Bandwidth-Limited

ThIII19:00-10:30SC4 Data Centre NetworksChairman: Nicola Sambo, SSSUP, Italy

9:00 ThIII1 - 1 High Performance Flat Data Centre Networks Based on Scalable Flow-Controlled Optical Switches (invited) Nicola Calabretta1; Wang Miao2; Fulong Yan2; H. J. S Dorren2

1: COBRA Research Institute, The Nederlands; 2: Eindhoven University of Technology, The NederlandsAbstract: We present a novel high performance flat data centre network employing bufferless and distributed fast (sub-microsecond) optical switches with wavelength, space, and time switching operation. A 4x4 prototypes optical switches based on off-the-shelf components has been employed in the experiments to assess the data centre network in terms of latency and packet loss. Experimental results and investigation study show less than 10^-5 packet loss and 640ns end-to-end latency with 0.4 load and 16-packet size buffer. Numerical investigation on the performance of the systems when the port number of the optical switch is scaled to 32x32 system indicate that more than 1000 ToRs each with Terabit/s interface can be interconnected providing a Petabit/s capacity.

9:30 ThIII1 - 2 Bypassing Routes Strategy for Optical Circuits in OPS-based Data Centre NetworksYue-Cai Huang; Yuki Yoshida1; Salah Ibrahim2;

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Despite the huge advantages of DMT it still requires a digital-to-analogue convertor (DAC), analogue-to-digital convertor (ADC), and DSP, which add cost and power consumption compared to systems based on simple formats such as OOK and PAM4. We discuss how system performance can be optimized using components of limited bandwidth and/or performance and evaluate the capacity penalty associated with it, especially when transmission over distances beyond 10 km is of interest.

9:30 ThI1 - 2 Photonic Chip Broadband Frequency Comb for Coherent Telecommunication (invited) Victor Brasch1, Michael Geiselmann1, Tobias Herr1,2, Grigoryi Lihachev3, Martin H. P. Pfeiffer1, Michael L. Gorodetsky3, and Tobias J. Kippenberg1

1: Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland; 2: Centre Suisse d’Electronique et Microtechnique SA (CSEM), Switzerland; 3: Faculty of Physics, M.V. Lomonosov Moscow State University, Russia & EPFL, SwitzerlandAbstract: We demonstrate coherent frequency combs

Colorless Self-Seeded Reflective-SOASimon Arega Gebrewold1; Romain Brenot2; Romain Bonjour1; David Hillerkuss1; Christian Hafner1; Juerg Leuthold1

1: ETH Zurich, Switzerland; 2: Alcatel-Thales III-V Lab, FranceAbstract: Subcarrier multiplexing is used to boost the performance of a limited bandwidth colorless, self-seeded reflective-SOA fiber cavity laser to 10 Gbit/s. This has been obtained by adapting subcarrier symbols rates, and power loading.

9:45 ThII1 - 3 Experimental Assessment of the Time-Varying Impact of Multi-Core Fiber Crosstalk on a SSB-OFDM SignalJoão Rosário1; Ruben S Luís2; Benjamin J Puttnam3; Yoshinari Awaji3; Naoya Wada3; Adolfo Cartaxo1

1: IIST-TUL, Portugal; 2: Infinera, USA; 3: NICT, JapanAbstract: The performance impact of inter-core crosstalk in a homogeneous 19-core multi-core fiber is assessed when transmitting directly detected single-sideband (SSB) orthogonal frequency-division multiplexing (OFDM) signals. It is shown that the crosstalk-induced error vector magnitude penalty varies over time and across OFDM subcarriers by as much as 7 dB over a period of 36 hours.

Ryo Takahashi2; Atsushi Hiramatsu2; Ken-ichi Kitayama1

1: Osaka University, Japan; 2: NTT, JapanAbstract: In OPS-based data centre networks, setting up temporal OCS paths for high-reliability-required large data transmissions is preferred. However, inappropriate OCS path selection could severely affect the original OPS traffic, which is because OCS path may break the network topology and cause OPS packet circulations. We propose to hold bypassing routes for every link of the OCS path when it is established. Then, the OPS packets could bypass the OCS links by being deflected to the bypassing routes. Therefore, this method facilitates the coexistence of OCS in OPS-based data centre networks. Simulations demonstrate the benefit achieved by our proposal compared to no-bypassing-route scenarios.

9:45 ThIII1 - 3 Timeslot Synchronization to Share Bandwidth for Any Route in Bufferless Bidirectional Ring NetworksKyota Hattori; Masahiro Nakagawa; Toshiya Matsuda; Masaru Katayama; Katsutoshi KodaNTT, JapanAbstract: We are developing a future metro network based on a 10 Gigabit Ethernet Passive Optical Network system to achieve both cost-effectiveness and high reliability. We propose a timeslot (TS) synchronization method to achieve a TS from a burst mode transceiver shared between any route of arbitrary fiber length by changing both the route of TS and the TS timing on each transceiver. We show the

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via soliton generation and dispersive-wave emission spanning over 75 THz, covering all telecommunication bands. They are generated on a Silicon Nitride photonic chip and represent an ideal coherent telecommunication source.

10:00 ThI1 - 3 Concurrent Multi-Channel Transmission of a DWDM Silicon Photonic Transmitter Based on a Comb Laser and Microring ModulatorsChin-Hui Chen1; M. Ashkan Seyedi1; Marco Fiorentino1; Daniil Livshits2; Alexey Gubenko2; Sergey Mikhrin2; Vladimir Mikhrin2; Raymond Beausoleil1

1: HP Laboratories, USA; 2: Innolume, GermanyAbstract: We demonstrate concurrent multi-channel transmission at 10 Gbps per channel of a DWDM silicon photonic transmitter. The DWDM transmitter is based on a single quantum dot comb laser and an array of microring resonator-based modulators.

10:15 ThI1 - 4 Programmable Multicarrier Generator for Elastic Superchannel Transponder/Regenerator

10:00 ThII1 - 4 NG-PON2 Architecture Enabled by Heterogeneous Space Division Multiplexing with Distributed Light Source: A Proof-of-Concept EvaluationRameez Asif1; Muhammad Imran2; Feihong Ye1; Luca Potì3; Toshio Morioka1

1: DTU, Denmark; 2: SSSUP, Italy, 3: CNIT, ItalyAbstract: We have numerically evaluated the next generation passive optical network stage-2 (NG-PON2) architecture based on heterogeneous space division multiplexing (SDM) and wavelength-division multiplexing (WDM). Error free transmission (BER of 1·10-9) is obtained for all the downstream (DS) and upstream (US) data tributaries, each carrying 40 Gbit/s data, over 20-km of 19-core multi-core fiber (MCF) and 6-spatial-mode few-mode fiber (FMF) without using multiple-input multiple-output (MIMO) digital signal processing (DSP), respectively.

10:15 ThII1 - 5 On Real-Time Implementaion of 400 Gbps Dual Polarization 16-QAM Coherent Intradyne ReceiverAntonia MastropaoloSSSUP, ItalyAbstract: This paper describes a real time hardware implementation of an adaptive fractionally spaced feed forward equalizer (FFE) on FPGA technology as preliminary step toward the development on a fully-

effectiveness of proposed method in exchange TSs in a bidirectional bufferless WDM/TDM ring networks during link failure through prototype systems.10:00 ThIII1 - 4 A Low-Latency Centralized Controller for MZI-based Optical Integrated NetworksFelipe Gohring de Magalhaes1; Rubana Priti2; Mahdi Nikdast1; Fabiano Hessel3; Odile Liboiron-Ladouceur2; Gabriella Nicolescu2

1: Ecole Polytechnique de Montreal, Canada; 2: Mcgill University, Canada; 3: PUCRS, BrazilAbstract: The design, implementation, and validation of a low-latency look-up-table-based centralized controller (LUCC) is presented. The LUCC is applied to different Mach-Zehnder Interferometer (MZI)-based photonic interconnects under dynamic workloads. We obtain a response time of only one clock cycle when using the LUCC in which the scalability can be up to 64 I/O ports.

10:15 ThIII1 - 5 On the cost, latency, and bandwidth of LIGHTNESS data centre network architectureFulong Yan1; Wang Miao2; H. J. S Dorren2; Nicola Calabretta3

1: Eindhoven University of Technology & TU/e, China; 2: Eindhoven University of Technology, The Netherlands; 3: COBRA Research Institute, The NetherlandsAbstract: We investigate and compare the cost, bandwidth, and latency of the LIGHTNESS data centre network (DCN) architecture adopting optical switching technologies with current

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Yutaka Mori; Koichi Maru; Haruna Matsushita; Takuya Nakagawa; Masahiko JinnoKagawa University, JapanAbstract: We propose a programmable multicarrier generator (MCG) as a key enabler to flexibly establish and regenerate multiple superchannels to connect various source-destination pairs. We design the programmable MCG with an integrated periodical optical filter array and show precise and flexible spectrum control of multiple subcarriers generated from individual tunable laser diodes.

custom ASIC. The presented equalizer is a part of a digital signal processing (DSP) system designed to be applied in a 400 Gbps dual polarization optical intradyne coherent system using 16-QAM modulation format. The whole DSP system is composed by the Automatic Frequency control (AFC) module, Bulk dispersion compensation module, FFE and a symbol-by-symbol detector. FFE is devoted to the compensation of linear effects due to the propagation along the fiber as group velocity dispersion (GVD) and polarization mode dispersion (PMD).

DCN architectures based on electrical switching technologies. The studies include the cost and latency models of all the required opto-electronics (electronic switches, transceivers, cables) and optical (circuit and packet switches) components to build the DCN architectures. Numerical results show that the LIGHTNESS DCN architecture has the lowest cost due to the huge reduction of expensive transceivers. Moreover, the flat LIGHTNESS DCN architecture outperforms the multi-stage electronic DCN architecture in terms of latency, while the bisection bandwidth can be dynamically and flexibly re-configured according to the required applications.

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ThI211:00-13:00SC1 Semiconductor Network subsystemsChairman: Radan Slavik, University of Southampton, UK

11:00 ThI2 - 1 Ultrafast pulse generation in semiconductor lasers (invited) Marc Sorel1 and Michael Strain2

1: Glasgow University, UK; 2: Strathclyde University, UKAbstract: Integrated semiconductor laser devices are presented as extremely compact generators of ultra-short pulse trains. Control is demonstrated on a wide range of emission parameters including wavelength, pulse duration, repetition rate and emitted power. All device geometries require simple drive electronics, consisting of only constant current injection and reverse bias voltage control.

11:30 ThI2 - 2 The Feasibility of Building a 64×64 Port Count SOA-Based Optical SwitchQixiang Cheng1; Minsheng Ding2; Adrian Wonfor2; Jinlong Wei2; Richard Penty2; Ian White2

1: Huawei, China; 2: University of Cambridge, UKAbstract: This paper for the first time demonstrates the feasibility of building a monolithically-integrated 64 x 64 SOA-based optical switch based on an modular

ThII211:00-13:00SC2 Photonic Switching Technologies IChairman: George Clapp, Telcordia, USA

11:00 ThII2 - 1 InP switching technology (invited) Richard PentyCambridge, UKAbstract: not available

11:30 ThII2 - 2 Performance Improvement of an EAM-Based Broadcast-and-Select Optical Switch ModuleYusuke Muranaka; Toru Segawa; Yoshihiro Ogiso; Takuro Fujii; Ryo TakahashiNTT, JapanAbstract: We present a performance-improved broadcast-and-select optical switch based on an EAM-gate array with a higher optical-coupling efficiency and eliminated electrical crosstalk. The coupling of optical fibers to the switch EAM-array has been improved by introducing spot size converters realized with a simple fabrication process, whereas the electrical crosstalk has been suppressed

ThIII211:00-12:45SC4 Spectrally and Spatially Flexible Optical NetworkingChairman: Masahiko Jinno, Kagawa University, Japan

11:00 ThIII2 - 1 Optical Performance Monitoring in Elastic Optical OFDM Networks (invited) Calvin C K Chan; Kam-Hon Tse; Tianwai Bo; Shuang GaoThe Chinese University of Hong Kong, Hong KongAbstract: Optical performance monitoring (OPM) is a crucial element in network management, in order to assure the quality of the optical signals at various intermediate and destination nodes. In future elastic optical network, the network operation is more adaptive and reconfigurable. The OPM monitoring information retrieved at each intermediate node would be useful for optimal network control. Common OPM parameters in an optical transmission system, include optical signal-to-noise ratio (OSNR), accumulated chromatic dispersion (CD) and polarization mode dispersion (PMD). In this paper, we present our OPM techniques for these three parameters, based on signal correlation procedures on one or a few pilot subcarriers inserted in the spectrum of an optical OFDM signal, which is one of the promising signal format to support the future elastic optical networks.

11:30 ThIII2 - 2 Techno-Economic Analysis of Flexi-Grid Networks with All-Optical Add/Drop Capability

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architecture experimentally tested in an 8 x 8 SOA switch. Using parameters derived from experiment, simulation results show that such a 64 x 64 SOA switch has a power penalty as low as 1 dB.

11:45 ThI2 - 3 Monolithically integrated all-optical SOA-based SR Flip-Flop on InP platformStelios Pitris1; Christos Vagionas2; George Kanellos2; Rifat Kisacik3; Tolga Tekin4; Ronald Broeke5; Nikos Pleros1

1: Aristotle University of Thessaloniki, Greece; 2: Centre for Research & Technology Hellas, Greece; 3: Fraunhofer Institute for Reliability and Microintegration, Germany; 4: Technische Universität Berlin, Germany; 5: Bright Photonics B. V., The NetherlandsAbstract: In this paper, we demonstrate for the first time a monolithically integrated InP All-Optical Flip-Flop (FF) based on optical coupled SOA-MZI switches. The experimental proof of principle demonstrated successful error free operation of SR-FF functionality at 5 Gb/s

12:00 ThI2 - 4 Fast Wavelength Switching in Semiconductor Micro-Ring Lasers Using Filtered Optical FeedbackMulham Khoder; Jan Danckaert; Guy VerschaffeltVrije Universiteit Brussel, BelgiumAbstract: We investigate the wavelength switching speed in semiconductor

by introducing a novel surface-ground electrode that provides an easy replacement for the regrowth process usually demanded for the EAMs electrical isolation. The fabricated module exhibits a fast switching time (<8 ns), low coupling loss (<3.5 dB/facet), small loss-deviation among its ports (<1.6 dB), and low PDL (<0.9 dB).

11:45 ThII2 - 3 Technologies for Fast, Scalable Silicon Photonic Switches (invited) Nicolas DupuisIBM T. J. Watson Research Centre, USAAbstract: We present fast Mach-Zehnder-based electrooptic silicon photonic switches. We review our latest results on low- insertion-loss and low-crosstalk broadband 2x2 and 4x4 switches designed and fabricated in IBM’s 90nm photonics- enabled CMOS process. We also highlight the main challenges that need to be addressed in order to enable the scalability of silicon photonics for optical switching.

12:15 ThII2 - 4 An Ultralow-Power Optical Label Processor

Pouria Sayyad Khodashenas1; Jose Manuel Rivas1; Dimitrios Klonidis1; Gilles Thouenon2; Christophe Betoule2; Erwan Pincemin3; Ioannis Tomkos1

1: AIT, Greece; 2: Orange Lab, France; 3: France Telecom, FranceAbstract: Thanks to recent advances in switching technology enabled by novel ultra-fine granularity filters, it is now possible to perform all-optical traffic grooming (AOTG) of low-rate signals over flexi-grid networks. To evaluate the potential benefits of the introduction of this new capability, a precise techno-economic analysis, taking into account the cost of the enabling transceivers and ROADMs, needs to be carried out. In this paper, we compare the potential economic benefits of the proposed AOTG-capable network to legacy solutions in a network planning scenario. The paper quantifies the spectrum and total equipment cost savings resulting from the use of AOTG, and assesses the profitability of the proposed solution.

11:45 ThIII2 - 3 Self-Adaptation Technique for Bandwidth-Variable TranspondersFrancesco FresiSSSUP, ItalyAbstract: Self-adaptive technique for Bandwidth Variable Transponders (BVTs) supporting superchannels in next generation optical networks is proposed. Automatic transponder configuration includes chromatic dispersion estimation, local oscillator fine tuning, maximization of information rate, subcarrier spacing optimization, while monitoring quality of transmission (QoT). The proposed procedure has been exploited in 1Tb/s field trial transmission over 1300 km.

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lasers that are wavelength tunable based on filtered optical feedback. The feedback section consists of two arrayed-waveguide gratings and four semiconductor optical amplifiers. The wavelength tuning and switching is controlled by changing the currents injected in the semiconductor optical amplifiers. We achieve a few nanoseconds wavelength switching speed. We also investigate how this switching speed depends on the phase and the amplitude of the feedback. We compare the experimental observations with numerical simulations based on a rate-equations model, from which we can identify the most important parameters that influence the switching speed.

12:15 ThI2 - 5 Third-order ring-resonator based InP Switch MatrixPrometheus DasMahapatra; Ripalta Stabile; Kevin WilliamsTechnical University of Eindhoven, The NetherlandsAbstract: An InP switch circuit is implemented and demonstrated for the first time using a matrix of 4x4 third-order ring resonators. 10Gb/s routing is demonstrated with a maximum power penalty of 2.5dB.

12:30 ThI2 - 6 Design and Experimental Investigation of Monolithic Polarization Controller with InGaAlAs/

12:00 ThIII2 - 4 On the Legacy Amplifier Limitation in Flexgrid Optical NetworksDjamel Amar1,3; Mohamad Kanj2; Jean-Luc Auge3; Nicolas Brochier3; Esther Le Rouzic3; Catherine Lepers4; Bernard Cousin4

1: Institut Mines-Télécom/Telecom SudParis, France; 2: B-com, France; 3: Orange Labs, France; 4: Institut Mines Telecom, Telecom SudParis, France; 5: University of Rennes, FranceAbstract: Flexgrid technology is an interesting solution to improve network capacity. However, for a given spectral band, it gives rise to the increase of the number of channels, requiring more amplification power in respect with the conventional fixed grid technology. In this work, we demonstrate that re-engineering the link margins allows supporting this increase while keeping in use legacy amplifiers.

12:15 ThIII2 - 5 Routing and Spectrum Allocation Method for Immediate Reservation and Advance Reservation Requests in Elastic Optical NetworksSeitaro Sugihara; Yusuke Hirota; Shohei Fujii; Hideki Tode; Takashi WatanabeOsaka University, JapanAbstract: Numerous studies have investigated elastic optical networks (EON) with the aim of expanding the transmission capacities of core networks. To achieve this goal, it is necessary to solve the issue of wastage of spectrum resources caused by spectrum fragmentation. Moreover, considering the potentially high traffic demands of future networks, it is important to handle not only requests that need to be reserved immediately (IR:

for 100-Gbps Optical Packet SwitchingSalah Ibrahim; Tatsushi Nakahara; Hiroshi Ishikawa; Ryo TakahashiNTT, JapanAbstract: A novel label processor subsystem for 100-Gbps (25-Gbps × 4λs) burst-mode optical packets has been developed with a significant reduction of power consumption and latency; based on an enhanced optoelectronic serial-to-parallel converter and a novel optical-trigger-pulse generator that consists of an SOA and a single-chip OEIC high-speed current driver.

12:30 ThII2 - 5 Large-Scale, MEMS-Actauated Silicon Photonic Switches (invited) Ming C. Wu, Tae J. Seok, Sangyoon Han, and Niels QuackUC Berkeley, USAAbstract: Large-scale silicon photonic switches with high port counts (64x64) and low on-chip losseshave been realized by integrating micro-electro-mechanical-system (MEMS) actuators withsilicon photonics. The switch

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InAlAs Multiple Quantum WellsKentaro Suzuki; Yuto Kawabata; Takuo Tanemura; Yoshiaki NakanoUniversity of Tokyo, JapanAbstract: We design active integrated polarization controller using half-ridge-waveguide polarization converter and InGaAlAs/InAlAs multiple-quantum-well-based phase shifters. From the numerical simulation and preliminary measurement, we demonstrate the feasibility of polarization switching to arbitrary state with less than 16.2-mW DC power consumption using a 5.6-mm-long device.

12:45 ThI2 - 7 Single-Step Dry-Etched Lateral PIN by Using Trench Structure for Optical Mode SwitchRyan ImansyahKyushu University, JapanAbstract: Trench structure that enables lateral PIN with single-step dry-etching is exploited to optical mode switch for the first time. Successful current-injected (60mA) optical mode switching was confirmed with polarization independent characteristics.

Immediate Reservation) but also those that can be reserved in advance (AR: Advance Reservation). In networks that support the coexistence of IR requests and AR requests, ensuring fair reservation of spectrum resources for both IR requests and AR requests becomes a challenging task. In this paper, we propose a novel dynamic routing and spectrum allocation method to reduce spectrum fragmentation and to improve the fairness in reservation for IR requests and AR requests. We verify the effectiveness of the proposed method through computer simulations.

12:30 ThIII2 - 6 Assessment of Flex-Grid/SDM Backbone Networks under Inter-Core XT-limited Transmission ReachJordi Perelló; Joan Gené Bernaus; Jose A Lazaro; Albert Pagès; Salvatore SpadaroUPC, SpainAbstract: In the present paper, we estimate the transmission reach of the optical signals through several state-of-the-art multicore fibers reported in the literature considering ASE noise and inter-core crosstalk. Using these estimations, we next assess the resource efficiency of Flex-grid/SDM backbone network deployments using the considered multi-core fibers against currently available multi-fiber link solutions.

Thursday - September 24 - ProgrammeTechnical Programme Committees

has fast (sub-microsecond) switching time, and has potential applications in reconfigurable networks for data-intensive computing.

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Poster SC1

Poster SC1 - 1 Fundamental performance tradeoffs for reverse biased free carrier plasma dispersion effect based silicon optical modulatorsSeyedreza Hosseini; Kambiz JamshidiTechnische Universität Dresden, GermanyAbstract: Design rules for optimizing reverse biased free carrier plasma dispersion effect based modulators are investigated using an analytical approach to model modulation efficiency, bandwidth, and optical loss of modulators.

Poster SC1 - 2 All Optical XOR Gate for Packet ForwardingAmel Farhat; Rim Farhat; Mourad MenifHigh School of Communications of Tunis, TunisiaAbstract: An all optical packet forwarding architecture using a single Semiconductor Optical Amplifier (SOA)-based Mach-Zehnder Interferometer (SOA-MZI) will be studied. The forwarding unit and the AND gate are combined in an all-optical XOR gate. Error-free functionality was achieved at 10 Gbps for two cascaded nodes.

Poster SC1 - 3 Design of a Current-Driven 2x2 Optical Switch Using Phase-Change MaterialKentaro Kato; Hiroyuki TsudaKeio University, JapanAbstract: We proposed and designed a current-driven 2x2 optical switch using Si waveguides and phase-change material. The structure of the phase shifter was optimized to reduce the required switching energy and insertion loss. The PCM film is 1.1 μm long and the maximum switching energy is 3.05 nJ. In the bar port state, the insertion loss is 2.84 dB, and in the cross port state, it is 0.75 dB.

Poster SC1 - 4 Autonomous Optical Buffer System for Synchronous Packets with Priority ControlHiroshi Masuoka; Yuta Maruo; Hiroki Kishikawa; Nobuo Goto; Shin-ichiro YanagiyaTokushima University, JapanAbstract: A scalable autonomous optical FDL buffer system for synchronous packets with priority control is proposed. The buffer having multiple input ports consists of 2:1 buffer modules. The buffering is autonomously controlled by a packet envelope and a priority tag.

Poster SC1 - 5 Optical Switch With Cascaded Two-Stage Mach-Zehnder Interferometers Using Optical Signal Amplitude and Phase ControlHiroki Kishikawa; Nobuo GotoTokushima University, JapanAbstract: We propose a novel optical switch consisting of cascaded two-stage MZI using optical signal amplitude and phase control. Theoretically analyzed switching condition reveals relations of amplitude and phase, which is confirmed by numerical simulations.

Poster SC1 - 6 Proposal of Optical Flip-Flop Operation between Two Phase States with a Single SOA and a Feedback LoopTakahiro Kamidai; Kenta Takase; Hiroki Kishikawa; Nobuo Goto; Shin-ichiro YanagiyaTokushima University, JapanAbstract: A flip-flop circuit between two phase states is proposed and analyzed. The optical circuit consists of a single SOA and a feedback loop. Numerically simulated results of flip-flop operation are presented.

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Poster SC2

Poster SC2 - 1 Impact of Tight Optical Filtering on Orthogonal Time-Frequency Domain Multiplexed Signals in Wavelength-Selective Switching SystemsTakahide SakamotoNICT, JapanAbstract: Orthogonal time-frequency domain multiplexing (OTFDM) enables ultra-wideband high-spectral-efficiency multicarrier transmission without relying on optical filters for multiplexing/demultiplexing of subchannels. Impact of tight filtering on OTFDM signal is investigated, assuming bandwidth narrowing in wavelength-selective switching networks.

Poster SC3

Poster SC3 - 1 Large-Scale System Partitioning using OCSCyriel Minkenberg1; German Rodriguez1; Bogdan Prisacari1; Laurent Schares2; Philip Heidelberger2; Dong Chen2; Craig Stunkel2; Nicolas Dupuis2

1: IBM Research, Zurich, Switzerland; 2: IBM T.J. Watson Research Centre, USAAbstract: Large-scale data centres for commercial workloads or high-performance computing can reap significant benefits by applying ``slow’’ (ms-scale) optical circuit switching (OCS) to enable reconfigurable system partitioning. Presently available commercial OCS offerings with hundreds of ports can enable partitioning of systems with tens of thousands of endpoints. We argue for the usefulness of such partitioning, and demonstrate how to apply it to large-scale dragonfly networks. To make this approach practically viable for exascale systems, cost-effective OCS and single-mode WDM transceivers will be required.

Poster SC3 - 2 Towards DSP Technology Interoperability for Next Generation Metro / Regional Optical NetworksAntonio Napoli1; Luca Potì2; Talha Rahman3; Gianluca Meloni2; Francesco Fresi4; Marc Bohn1; Nicola Sambo4; Danish Rafique1; Joao Pedro5

1: Coriant, Germany; 2: CNIT, Italy; 3: Eindhoven University of Technology, The Netherlands; 4: SSSUP, Italy; 5: Coriant, PortugalAbstract: We present the challenges, opportunities and limitations of DSP technology interoperability between different system vendors for next generation metro / regional optical networks. We compare the performance of single vendor versus multi-vendor DSP units when experimentally transmitting 1 Tb/s PM-16QAM over standard single mode fiber.

Poster SC3 - 3 Cost Analysis of Super-Channel based Colorless, Directionless and Contentionless (CDC) ROADM ArchitecturesAnuj Malik; Marco SosaInfinera, USAAbstract: This paper compares the incremental cost of CDC features in super-channel based and wavelength based ROADM architectures. A real world network model analysis shows fewer network components and less incremental cost with super-channel CDC ROADM.

Poster SC3 - 4 Single DWDM Channel 56 Gbps 2 km Transmission Based on Injection Locked FP Laser Enabling Beyond Tbps Intra-DC ConnectionJun Luo1; Zhi Feng1; Kangping Zhong2; Bo Wu1; Chao Lu2

1: Huawei, China; 2: The Hong Kong Polytechnic University, ChinaAbstract: By employing an injection locked FP laser (IFP), we successfully achieved 56 Gbps PAM-4 transmission over 2 km SSMF. The IFP laser behaves as a colorless CW source, and 32 DWDM wavelengths are generated by simply connecting the FP laser to different DWDM multiplexer port. These results indicate a beyond Tbps 2km connection solution by densely wavelength multiplexing the IFP transmitter.

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Poster SC3 - 5 Mitigation of Inter-Carrier Interference Induced by Phase Noise and Residual Carrier Frequency Offset in CO-OFDM SystemsXun Guan; Tianwai Bo; Calvin C K ChanThe Chinese University of Hong Kong, Hong KongAbstract: We propose and experimentally demonstrate a novel method to mitigate the inter-carrier interference (ICI) induced by laser phase noise in CO-OFDM systems. Numerical studies also show its capability of jointly mitigating phase noise and residual carrier frequency offset.

Poster SC4

Poster SC4 - 1 Impairment-aware Optical Multicast Tree Design with Modulation Format OptimizationSoubhik Deb1; Hiroshi Hasegawa2; Yojiro Mori2; Ken-ichi Sato2

1: IIT Bombay, India; 2: Nagoya University, JapanAbstract: A novel optical multicast tree design algorithm is proposed for elastic optical path networks; it considers signal regeneration and modulation format adaptation. The algorithm minimizes not only the number of costly regenerators needed, but also the total frequency slots necessary by optimizing the modulation formats applied. By formulating the problem as two-stage integer linear programming on an auxiliary graph, the proposed algorithm successfully calculates optimal trees on large networks within several tens of seconds.

Poster SC4 - 2 Evaluation of Frequency Utilization Enhancement with Transmission-Characteristics-Aware Grouped Optical Path RoutingYuki Terada1; Yojiro Mori1; Hiroshi Hasegawa1; Ken-ichi Sato1; Takafumi Tanaka2

1: Nagoya University, Japan; 2: NTT, JapanAbstract: We investigate the performances of Grouped Routing which greatly mitigates the filter passband narrowing effect.

Numerical experiments demonstrate that the optimal modulation format and channel spacing, considering the impairment by filtering effect and fiber transmission, can reduce the necessary number of fibers by up to 21.9%.

Poster SC4 - 3 CAPEX and OPEX Saving in SDN-Compliant Sub-Wavelength Switching SolutionAhmed Triki; Annie Gravey; Philippe GraveyTélécom Bretagne, FranceAbstract: The present paper attempts to answer the question “is it worth implementing dynamic resource allocation in a metro-core network ?” Our study evaluates the gain (CAPEX and OPEX) to expect in a Time-Domain Wavelength Interleaved Network (TWIN) when the number of active Tx/Rx changes, over the day, according to the traffic matrix. We assume that TWIN is implemented in an SDN framework in which burst emission schedules can be periodically recomputed thus taking into account traffic matrix changes. A comparative study is carried out to assess, for different values of the computation period, the OPEX and CAPEX savings on the basis of the number of active Tx/Rx. Results show that such a dynamic network re-configuration approach can bring some CAPEX savings and more significant OPEX savings in a realistic metro/core network scenario, even for rather large computation periods.

Poster SC4 - 4 Optical Packet Switching using Reconfigurable 400G/200G Nyquist PDM-16QAM/QPSK TranspondersZe DongHuaqiao University, ChinaAbstract: A high spectrally efficient optical packet switching system using rate-compatible 400G/200G Nyquist PDM-16QAM/QPSK transponders is presented. The key functions of optical packet coordination, label separation, coherent detection for adaptive dual-carrier 400G/200G payload, and polarization insensitive wavelength conversion are experimentally demonstrated.

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Poster SC4 - 5 A Low-cost OFDMA-PON Upstream Architecture Using Direct-Detection for Front-Haul Service in Cloud Radio Access NetworksAhmed Galib Reza1; June-Koo Kevin Rhee1; Geun Young Kim2

1: KAIST, Korea; 2: HFR, KoreaAbstract: A novel upstream design for OFDMA-PON using direct-detection is proposed for 5G cloud radio-access-network services. A simulation study for uncontrolled-wavelength 10 Gbit/s upstream transmissions from 3 user units is presented.

Poster SC4 - 6 Dynamically Reconfigurable Low-cost Sub-band OFDMA for Front-haul Downlink in Cloud Radio Access NetworksAhmed Galib Reza1; June-Koo Kevin Rhee1; Jong Heon Lee2

1: KAIST, Korea; 2: HFR, KoreaAbstract: A dynamically reconfigurable narrow-bandwidth OFDMA design using intensity-modulation direct-detection (IMDD) for a 40-Gbps downlink of radio access networking is presented. We show that only a fraction of the OFDMA bandwidth is required for sub-band demultiplexing to provide 5G fronthaul networking.

Poster SC4 - 7 Demonstration of Dynamic Congestion Control in Optical Packet Switching Network employing Rate-Adaptive Transmitter and ReceiverNoboru Yoshikane1; Xiaoyuan Cao2; Yuki Yoshida3; Masato Nishihara3; Masaki Shiraiwa4; Takehiro Tsuritani1; Itsuro Morita1; Tomoo Takahara3; Toshiki Tanaka3; Jens C. Rasmussen3; Naoya

Wada4; Ken-ichi Kitayama2

1: KDDI R&D Laboratories, Japan; 2: Osaka University, Japan; 3: Fujitsu Limited, Japan; 4: NICT, JapanAbstract: We experimentally demonstrate dynamic congestion control in an optical packet switching network employing an optical packet counter for traffic flow diagnosis and a rate-adaptive transmitter and receiver to reduce packet loss ratio while preserving the transmission capacity.

Poster SC4 - 8 Flexrate technology for multi-layer interworking - the practical benefit of fine-granular rate adaptability in aggregation networksMatthias Gunkel and Felix WisselDeutsche Telekom, GermanyAbstract: This paper evaluates the potential of optical rate-adaptive transmission technology in IP-based networks. The offered optical flexibility is beneficially utilized in a coordinated multilayer resilience (MLR) in reaction to a network failure. The underlying flexrate technology is reviewed and realistic transceivers with fine-granular rate adaptation are drafted. After introducing an application scenario in DT’s aggregation network, we identify the practical techno-economic benefit from dynamic multilayer aware flexrate operations. For fine-granular rate adaptability we achieve a network capacity benefit of more than 75% compared to coarse-granular flexrate transceivers. A further 9% higher exploitable IP capacity is derived from parallel lightpath guidance through our ring-based infrastructure for approximately no extra costs.

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ThI316:00-17:00SC1 Switching elementsChairman: Michael Strain, Strathclyde University, UK

16:00 ThI3 - 1 Silica MEMS cantilever arrays (invited) Peter G. R. Smith; Peter A. Cooper; James C. Gates; Christopher Holmes; Lewis G. Carpenter; Paolo L. MenneaUniversity of Southampton, UKAbstract: This invited paper covers the development of UV written MEMS cantilevers on silica-on-silicon. The work uses novel fabrication tools including physical micromachining and UV laser direct writing. Each cantilever contains an optical waveguide and by actuating the cantilevers we have demonstrated optical attenuation operation in an array format.

16:30 ThI3 - 2 Reconfigurable Quantum Photonic Circuits based on Nano-Electro-Mechanical SystemsLeonardo Midolo1; Tommaso Pregnolato1; Gabija Kiršanskẻ1; Maurangelo Petruzzella2; Francesco Pagliano2; Tian Xia2; Frank van Otten2; Andrea Fiore2;

ThII316:00-17:30SC3 Optical Packet Switching technologiesChairman: Junya Kurumida, AIST, Japan

16:00 ThII3 - 1 Monolithic InP-based fast optical switch module for optical networks of the future (invited) Xi Chen1; James Regan2; Tim Durrant2; Yi Shu1; George Saridis1; Georgios Zervas1; Dimitra Simeonidou1; Valerija Kamchevska3; Anna Manolova Fagertun3; Siyuan Yu1

1: University of Bristol, UK; 2: Venture Photonics Ltd, UK; 3: Technical University of Denmark, DenmarkAbstract: We summarized the development of Venture Photonics’ sub-10 ns fast optical switch which demonstrates low insertion loss, excellent crosstalk level and polarization independent switching performance.

16:30 ThII3 - 2 100-Gbps Technologies of Hybrid Optoelectronic Routers for a Torus Datacentre Network (invited) Toru Segawa; Salah Ibrahim; Tatsushi Nakahara; Hiroshi Ishikawa; Ryo TakahashiNTT, JapanAbstract: We present the recent developments on the underlying 100-Gbps optical packet processing technologies for the hybrid optoelectronic router (HOPR) prototype being developed to enable an energy-efficient and low-latency Torus photonic data centre network equipped with smart flow-control. In the new 100-Gbps HOPR upgraded from an earlier prototype, we target an energy consumption of 90 mW/Gbps and latency of less

ThIII316:00-17:30SC4 Next generation Converged Wireless/Optical NetworksChairman: Ken-ichi Sato, Nagoya University, Japan

16:00 ThIII3 - 1 SDN solutions for 5G transport networks (invited) Paola Iovanna; Fabio UbaldiEricsson, ItalyAbstract: This paper presents the impact of 5G on transport with related features and challenging issues. An SDN solution is proposed with some relevant performance results.

16:30 ThIII3 - 2 Fixed Mobile Converged Transport: COMBO Perspective (invited) Dirk Breuer1; Sandro Krauss1; Erik Weis1; Stéphane Gosselin2; Jose Alfonso Torrijos3

1: Deutsche Telekom, Germany; 2: Orange Labs, France; 3: Telefonica, SpainAbstract: This paper investigates the potential of converged transport in the access network for fixed and mobile networks particularly with respect to future massive small cell deployment.

17:00 ThIII3 - 3 Virtual Private Networks in RoF-OFDM-PON with Physical-layer Network CodingXun Guan; Tianwai Bo; Calvin C K Chan

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Søren Stobbe1; Peter Lodahl1

1: University of Copenhagen, Denmark; 2: COBRA Research Institute, The NetherlandsAbstract: We present recent progress on the development of nano-opto-electromechanical systems (NOEMS) for solid-state quantum photonics and discuss the application of optical switching networks for de-multiplexing single photons generated by semiconductor quantum dots.

16:45 ThI3 - 3 Performance Analysis of a Hybrid Opto-Electronic Packet Switch using WDM TechnologyWiem Samoud1; Cedric Ware1; Mounia Lourdiane2

1: Institut Mines Telecom, Telecom ParisTech, CNRS LTCI, France; 2: TELECOM SudParis, FranceAbstract: We investigate the performance of a hybrid optoelectronic switch where the connected azimuths support WDM channels, taking into account different packet classes. A compromise is discussed between the energy savings and the performance improvement given by using shared wavelength converters.

than 100 ns. Together with HOPR’s architecture, we review the role of the newly developed subsystems namely the label processor, optical switch, and optoelectronic shared buffer in achieving the new targets.

17:00 ThII3 - 3 Novel Mode-selective Packet SwitchingMasahiro Hayashi1; Nikolaos Panteleimon Diamantopoulos1; Yuki Yoshida1; Akihiro Maruta1; Ryo Maruyama2; Nobuo Kuwaki2; Katsuhiro Takenaga2; Hitoshi Uemura2; Matsuo Shoichiro2; Ken-ichi Kitayama1

1: Osaka University, Japan; 2: Fujikura, JapanAbstract: A novel mode-selective packet switching, based on mode-multiplexers/demultiplexers and multi-port optical MEMS switches, has been proposed and experimentally demonstrated over a 30-km long few-mode fiber link using 16-QAM signals without serious signal impairments.

17:15 ThII3 - 4 Novel Flat DCN Architecture Based on Optical Switches with Fast Flow ControlFulong Yan1; Wang Miao2; H. J. S Dorren2; Nicola Calabretta3

1: Eindhoven University of Technology & TU/e, China; 2: Eindhoven University of Technology, The Netherlands; 3: COBRA Research Institute, The NetherlandsAbstract: We propose a novel flat data centre network architecture based on distributed buffer-less optical switches. Numerical analyses reporting 8µs latency, <10-8 packet loss and >1Gb/s average network throughput under load of 0.4 for data centre of 100000 servers indicates the potentiality of the proposed data centre network architecture.

The Chinese University of Hong Kong, Hong KongAbstract: We propose and experimentally demonstrate an application of physical-layer network coding to realize virtual private network (VPN) on a radio-over-fiber based OFDM-PON. Two optical signals are combined together physically to share the same physical path and can be individually decoded at theirrespective destinations. The proposed scheme improves VPN throughput compared to conventional schemes.

17:15 ThIII3 - 4 Mode-unbundled Transmission over a 30-km Two-mode Fiber via OFDM-based Pre-crosstalk Suppression TechniqueShota Noguchi1; Nikolaos Panteleimon Diamantopoulos1; Yuki Yoshida1; Akihiro Maruta1; Ken-ichi Kitayama1; Ryo Maruyama2; Matsuo Shoichiro2; Nobuo Kuwaki2

1: Osaka University, Japan; 2: Fujikura, JapanAbstract: A DSP-aided transmitter-side crosstalk (XT) suppression technique for mode-unbundled transmission is proposed and demonstrated. The cooperatively-modulated OFDM subcarriers suppress the modal XT and enable the treatment of modes as individual channels without MIMO-DSP in a 30-km two-mode fiber link.

Thursday - September 24 - ProgrammeTechnical Programme Committees

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FrI19:00-10:15SC1 Silicon devicesChairman: David Moss, CUDOS, Australia

9:00 FrI1 - 1 Towards VLSI photonics with PDK: tolerances, sensitivity, yield (invited) Andrea Melloni, D. MelatiPolitecnico di Milano, ItalyAbstract: Process Design Kits are enabling the access to generic photonic foundries according to the scheme of multiple projects wafer. Here we show the importance to include also statistical data to evaluate the effects of production process fluctuations on the response of photonic integrated circuits. Sensitivity analysis by M- and Sobol indices allow to measure the impact of random parameters on the transfer function variability, estimate the yield and achieve a robust and reliable design.

9:30 FrI1 - 2 Experimental Demonstration of Bidirectional Transmissions in a Photonic Integrated Network on Chip with Bus TopologyStefano Faralli1; Fabrizio Gambini1; Paolo Pintus1; Odile Liboiron-Ladouceur2; Piero Castoldi1; Nicola Andriolli1; Isabella Cerutti1

FrII19:00-10:30SC2 Advanced Modulation and Signal ProcessingChairman: Ken-Ichi Kitayama, Osaka University, Japan

9:00 FrII1 - 1 Autonomously Controlled All-Optical Signal Conditioning for Dynamic Optical Path Networks (invited) Ken Tanizawa1; Hiroyuki Matsuura1; Haruhiko Kuwatsuka1; Shu Namiki1; Kensuke Ogawa2; Toshimitsu Kaneko3; Eiichi Banno3; Katsumi Uesaka3; Hajime Shoji3; Shigehiro Takasaka4; Takeshi Yagi4; Kazuya Ota5; Hidenori Iwai5; Yoichi Oikawa5

1: AIST, Japan; 2: Fujikura, Japan; 3: Sumitomo Electric Industries, Japan; 4: Furukawa Electric, Japan; 5: Trimatiz, JapanAbstract: We develop an autonomous parametric dispersion compensator with a fast tunable pump light source and a fast dispersion monitor. Fully automatic dispersion management is demonstrated in dynamic optical path testbed networks.

9:30 FrII1 - 2 Analytical Investigation of All-Optical FEC Coding Scheme with Convolutional CodeYohei Aikawa; Hiroyuki UenoharaTokyo Institute of Technology, JapanAbstract: In this paper, we propose an optical forward-error-correction (FEC) coding scheme with convolutional code using FWM in a HNLF to realize adaptive coding

FrIII19:00-10:30SC3 Transmission SystemsChairman: Hiroyuki Uenohara, Tokyo Institute of Technology, Japan

9:00 FrIII1 - 1 Optical transceivers using heterogeneous integration (invited) Jonathan E. Roth1; Erik J. Norberg1; Jared F. Bauters2; Brian R. Koch1; Daniel K. Sparacin1; Gregory A. Fish1

1: Aurrion, USA; 2: UCSB, USAAbstract: The heterogeneous integration of InP into a silicon photonics platform enables the integration of diverse photonic elements in a cost-effective manufacturing process that fundamentally changes how photonic transceivers can be packaged and integrated into systems. This paper describes Aurrion’s technology and provides some recent experimental results at the component and system level. Keywords—transceivers; heterogeneous integration; photonic integration.

9:30 FrIII1 - 2 High Capacity Optical Transmission Systems using Spatial Division Multiplexing Technology (invited) Ezra Ip1; Giovanni Milione1; Neda Cvijetic1; Yue-Kai Huang1; Ming-Jun Li2; John D Downie2

1: NEC, USA; 2: Corning, USA

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1: SSSUP, Italy; 2: McGill University, CanadaAbstract: This paper presents a photonic integrated circuit (PIC) for NoC with a bus topology and demonstrates the feasibility of concurrent counter-propagating optical transmissions at the same wavelength. Bit error rate measurements indicate that bus is able to support bidirectional transmissions with a penalty below 1.5 dB for a BER of 10-9.

9:45 FrI1 - 3 Optical Power Meter Co-Integrated with a Fast Optical Switch for On-Chip OSNR MonitoringRipalta Stabile; Kevin WilliamsTechnical University of Eindhoven, The NetherlandsAbstract: We demonstrate an OSNR meter co-integrated with a photonic integrated switch for on-chip measurement. A scheme for on-chip electronic calibration is proposed using switch gates as detectors. Integrated photocurrent measurements are performed for noise and signal using an on-chip cyclic router and gates in combination with multi-channel electronic integrators to demonstrate an OSNR dynamic range extending from 6 to 40 dB/0.1nm.

10:00 FrI1 - 4 Data Rate Enhancement of Dual Silicon Ring Resonator

scheme corresponding to the signal-to-noise ratio between nodes. The performance of the proposed scheme was analytically investigated for 2^{11}-1 PRBS DPSK-modulated RZ format signals at 10Gbps. The insertion losses of the FEC coding circuit were approximately 0.5 and -0.8dB at BER=10^{-9} in the cases of two- and three-input optical XOR operations, respectively, indicating that the proposed scheme offers a net coding gain.

9:45 FrII1 - 3 Polarization Division Multiplexed Optical Eigenvalue ModulationAkihiro Maruta; Yuki MatsudaOsaka University, JapanAbstract: We propose a polarization division multiplexed optical eigenvalue modulation scheme based on the invariant property of eigenvalue associated to Manakov equation. We numerically demonstrate the feasibility of the proposed scheme.

10:00 FrII1 - 4 Simple and effective solutions for low-cost coherent WDM-PONs (invited) Ernesto Ciaramella1; Fabio Bottoni1; Raffaele Corsini1; Marco Presi1; Massimo Artiglia2

1: SSSUP, Italy; 2: CNIT, ItalyAbstract: This paper presents the most significant results achieved in the last two years by our group in coherent ultradense- WDM PON for lambda-to-the-user access. Here we mostly focus on the architectures

Abstract: We review system aspects of few-mode fiber transmission. Mode-dependent loss is difficult to manage and will likely require periodic mode-scrambling. FMF can be deployed first in short reach applications where high spatial density is beneficial, with elliptical-core FMFs being an attractive solution.

10:00 FrIII1 - 3 Common Phase Error Estimation for Coherent Optical OFDM System Using Best-fit Minimum Bounding BoxTianwai Bo; Calvin C K ChanThe Chinese University of Hong Kong, Hong KongAbstract: A new spectral-efficient image processing based scheme is proposed to blindly estimate the common phase error of coherent optical orthogonal frequency division multiplexing system. The scheme provides new perspective for compensating laser phase noise effect through simple image processing techniques used in computer vision. It shows comparable performance with conventional pilot aided method but much improved spectral efficiency.

10:15 FrIII1 - 4 Extended Distance Transmission over Wideband MMF using Multi-wavelength VCSEL based TransceiversRakesh Sambaraju1; Adrian Amezcua-

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Carrier-Injection Modulators by PAM-4 EncodingM. Ashkan Seyedi; Chin-Hui Chen; Marco Fiorentino; Raymond BeausoleilHP, USAAbstract: Two rings are thermally tuned to near-resonance and individually modulated by two uncorrelated, NRZ encoded PRBS data sources at 1 GBd/s at different extinction ratios to achieve a 2 Gb/s. Experimental data is shown as a proof-of-concept for this approach.

based on simple OOK-NRZ modulation format. We demonstrated the real-time implementation of our coherent receiver and we proved its compatibility with direct modulated laser (DML). Receiver sensitivities as low as -48 dBm at BER=1·10-3 for 1.25 Gb/s has been observed, showing the feasibility of a coherent ONU receiver based on devices commonly available and with limited cost. The system support quite high ODN losses and allows the lambda-to-the-user approach.

Correa2; Scott Steinhauer1; Matt Schumacher1; Mike Good1; Paul Vanderlaan1; Denis Molin2; Marianne Bigot2; Frank Achten3; Pierre Sillard2

1: Berk-Tek LLC, USA; 2: Prysmian Group, France; 3: Prysmian Group, The NetherlandsAbstract: We verify the performance of a bi-directional multi-wavelength 40GbE transceiver over OM4 and wideband multimode fibre; and demonstrate record transmission of 300 m over wideband MMF. This is a 150 m length increment over the standard OM4.

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FrI211:00-12:30SC4 Optical Network ControlChairman: Ioannis Tomkos, AIT, Greece

11:00 FrI2 - 1 Multi-layer orchestration for application-centric networking (invited) Ori Gerstel1; Victor Lopez2; Domenico Siracusa3

1: Sedona Systems, Israel; 2: Telefonica, Spain; 3: CREATE-NET, ItalyAbstract: We argue that the implementation of services in an IP-optical network should be driven by the needs of the specific applications, and explain why this requires a centralized orchestration architecture.

11:30 FrI2 - 2 Optical Network Programmability - Requirements and Applications (invited) Achim Autenrieth1; Jörg-Peter Elbers1; Thomas Szyrkowiec1; Pawel Kaczmarek2; Wolfgang Kellerer3

1: ADVA Optical Networking, Germany; 2: ADVA Optical Networking, Poland; 3: Technische Universität München, GermanyAbstract: Datacentre operators and internet content providers require optical network programmability to efficiently interconnect distributed datacentres. This paper describes the requirements, applications and use cases for optical network programmability. Based on application scenarios, open northbound

FrII211:00-12:30SC2 Photonic Switching Technologies IIChairman: Ken Tanizawa, AIST, Japan

11:00 FrII2 - 1 Large Port Count Optical Switch Systems for Future Datacentres (invited) Ken-ichi SatoNagoya University, JapanAbstract: Applying optical switching to datacentre networks will increase network bandwidth and reduce power consumption while meeting the explosive traffic increase. Two of the critical attributes of optical switches are scalability and cost effectiveness. The wavelength routing switch offers the solution to the development of large port count optical switches.

11:30 FrII2 - 2 Injection-locked weak-resonant-cavity laser diode with transient response switching for wavelength reused full-duplex transmissionYu-Chieh Chi; Chung-Yu Lin; Hsiang-Yu Chen; Gong-Ru LinNational Taiwan University, TaiwanAbstract: An injection-locked weak-resonant-cavity Fabry-Perot laser diode (WRC-FPLD) with transient response switching for wavelength reused full-duplex transmission with downstream 10-Gbit/s non-return-to-zero on-off-keying (NRZ-OOK) and upstream 18-Gbit/s 64-quadrature amplitude modulation orthogonal frequency-division multiplexing (QAM OFDM) data is demonstrated. No matter what injection wavelength is selected, the

FrIII211:30-12:30SC3 Optical Switch ArchitectureChairman: Dominique Chiaroni, ALU, France

11:30 FrIII2 - 1 Spatial and Planar Optical Circuit for Wavelength Selective Switch Applications (invited) Yuichiro Ikuma; Kenya SuzukiNTT Corporation, JapanAbstract: We describe a spatial and planar optical circuit (SPOC) platform, on which a waveguide-based optical frontend is incorporated with free-space optics (FSO), and its applications. A SPOC can increase the number of ports and enhance the functionality of wavelength selective switches (WSSs). We describe an ultra-high port count 1 x 95 WSS and an 8 x 24 transponder aggregator (TPA) based on the SPOC.

12:00 FrIII2 - 2 Large-Scale Optical Switch with Simplified Sub-Switch Connections for Datacentre ApplicationKoh Ueda1; Yojiro Mori1; Hiroshi Hasegawa1; Ken-ichi Sato1; Toshio Watanabe2

1: Nagoya University, Japan; 2: NTT,

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APIs with different levels of control and abstraction to address different network operator requirements which are defined. For their illustration, use cases for optical network programmability show current research directions.

12:00 FrI2 - 3 iONE: A Workflow-Oriented ABNO ImplementationLuis Velasco; Lluis GifreUPC, SpainAbstract: An implementation of the IETF standardized ABNO architecture, named as iONE is presented. iONE consists in one single generic configurable module and a set of dynamically linkable workflows. The spectrum defragmentation use case is used to experimentally demonstrate iONE’s functionalities.

12:15 FrI2 - 4 Alien Wavelength Modeling Tool and Field TrialNicola Sambo1; Andrea Sgambelluri1; Marco Secondini1; Martin Nordal Petersen2; Guy Roberts3; Anna Manolova Fagertun2

1: SSSUP, Italy; 2: Technical University of Denmark, Denmark; 3: GEANT, UKAbstract: A modeling tool is presented for pre-FEC BER estimation of PM-QPSK alien wavelength signals. A field trial is demonstrated and used as validation of the tool’s correctness. A very close correspondence between the performance of the field trial and the one predicted by the modeling tool has been reported.

WRC-FPLD preliminarily confirms its data-erasing ability. By reusing the data-encoded downstream carrier for injection-locking, the 25-km single-mode fiber (SMF) transmitted upstream 18-Gbit/s 64-QAM OFDM data reveals a bit error rate (BER) of 1.1E-3.

11:45 FrII2 - 3 Cross-talk Tolerant Multicarrier Optical Packet: Concept and DemonstrationShota Noguchi; Yuki Yoshida; Ken-ichi KitayamaOsaka University, JapanAbstract: A novel optical multi-carrier packet format, which is tolerant of in-band-crosstalk in high-speed optical switches, is proposed and demonstrated experimentally by a 2×2 switching of 10-Gbaud coherent optical OFDM packets.

12:00 FrII2 - 4 Silicon nanophotonic integrated devices for networks-on-chip: multiplexing and switching (invited) Daoxin DaiZhejiang University, ChinaAbstract: In this paper we give a review on silicon nanophotonic integrated devices for networks-on-chip, including hybrid (de)multiplexers enabling more than two popular multiplexing technologies like wavelength-division-multiplexing (WDM), polarization-division-multiplexing (PDM), as well as mode-division-multiplexing (MDM). Recent progresses on thermal-switchable silicon photonic devices are also discussed regarding the increasing demands for reconfigurable photonic networks-on-chip.

JapanAbstract: We introduce an asymmetric-port-count DC switch that can simplify fiber connection arrangement in a large-scale optical switch. A 24x4 DC switch is monolithically implemented with PLC technologies and its good performance is experimentally confirmed.

12:15 FrIII2 - 3 Benchmark Analysis of AWGR-based Optical Tiled Architectures for Multi-Socket HPC BoardsPaolo Grani; Roberto Proietti; S. J. Ben YooUniversity of California, Davis, USAAbstract: We analyze the execution time and energy performance of tiled optical multi-socket HPC boards with all-to-all AWGR-based interconnection and with different optimizations techniques under PARSEC benchmarking traffic and we compare it against a state-of-the-art electronic multi-socket architecture. Benchmark results show significant performance improvements and up to 2× energy saving when using dynamic variable bandwidth communication technique.

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Notes

Convitto della Calza

Mercato Centrale

Terrazza Brunelleschi

Palazzo Borghese

Stazione Santa Maria Novella

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