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Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM-QPSKalien wavelength and adjacent 10Gb/s channels
Nuijts, Roeland; Bjørn, Lars Lange; Petersen, Martin Nordal; Fagertun, Anna Manolova
Published in:Proceedings of the TERENA Networking Conference
Publication date:2011
Document VersionPublisher's PDF, also known as Version of record
Link back to DTU Orbit
Citation (APA):Nuijts, R., Bjørn, L. L., Petersen, M. N., & Manolova, A. V. (2011). Design and OAM&P aspects of a DWDMsystem equipped with a 40Gb/s PM-QPSK alien wavelength and adjacent 10Gb/s channels. In Proceedings ofthe TERENA Networking Conference
Design and OAM&P aspects of a DWDM system equipped with a 40Gb/s PM QPSK alienequipped with a 40Gb/s PM-QPSK alien wavelength and adjacent 10Gb/s channels
Lars Lange Bjørn, NORDUnetRoeland Nuijts, SURFnetMartin Nordal Petersen DTU FotonikMartin Nordal Petersen, DTU FotonikAnna Vasileva Manolova, DTU Fotonik
Terena Networking Conference 201116 - 19 May, Prague, Czech Republic
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OutlineOutline
HistoryDesignVPI off-line simulationsExperimental resultsExperimental resultsOAM&PCosts considerationsConclusion
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HistoryHistory
April 2009: SURFnet fosters the idea of deploying an alien wavelength.SURFnet purchases and install additional needed hardwareReady to go – September 2009
November 2009: Hero experiment presented at SC, Portland Oregon.Ability of both network was testedShortcomings identifiedgOperated in un-optimized conditions; BER < 3,0 10-16
June 2010: TNC 2010, Vilnius, Lithuania.Simulations in Ciena Optical ModellerOptimized condition BER < 10-17
May 2011: TNC 2011, Prague, Czech Republic.Whats new?
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System configuration May 2011System configuration May 2011
10G i hb• 10G neighbours• Guardband variation
50 – 150 GHz• Full control of spectrum
in NORDUnet• Off-line VPI simulations
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VPI simulationsVPI simulations
GOALS
• Verification of
CHALLENGES
• Obtaining all needed• Verification of experimental results
• Facilitate design and t l f t t
• Obtaining all needed information about componentsLi iti th VPI d l tcontrol of current setup
• Investigate option for future Multi-
• Limiting the VPI model to include the most important aspects of the
domain/vendor simulation tool
design
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VPI configurationVPI configurationM
ux
Amsterdam – Hamburg –
St x
40G
Pol
M Mux EDFAAmsterdam Hamburg
Hamburg Copenhagen OSNR Filter (demux)
DSP
toring data1
G N
RZ EDFA 10G NRZ
Mux
Visualizer3
x 10
G
De-mux10G NRZ
rs
10G NRZ
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VPI: AmsterdamVPI: AmsterdamM
ux
Amsterdam – Hamburg –
St x
40G
Pol
M Mux EDFAAmsterdam Hamburg
Hamburg Copenhagen OSNR Filter (demux)
DSP
toring data1
G N
RZ EDFA 10G NRZ
Mux
Visualizer3
x 10
G
De-mux10G NRZ
rs
10G NRZ
• 40G PM-QPSK injection• Additional 10G’s• MUX• Pre-AMP
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VPI: Amsterdam HamburgVPI: Amsterdam - HamburgM
ux
Amsterdam – Hamburg –
St x
40G
Pol
M Mux EDFAAmsterdam Hamburg
Hamburg Copenhagen OSNR Filter (demux)
DSP
toring data1
G N
RZ EDFA 10G NRZ
Mux
Visualizer3
x 10
G
De-mux10G NRZ
rs
10G NRZ
• 640km TWRS• 9 amps• No CD compensation
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VPI: HamburgVPI: HamburgM
ux
Amsterdam – Hamburg –
St x
40G
Pol
M Mux EDFAAmsterdam Hamburg
Hamburg Copenhagen OSNR Filter (demux)
DSP
toring data1
G N
RZ EDFA 10G NRZ
Mux
Visualizer3
x 10
G
De-mux10G NRZ
rs
10G NRZ
• DE-MUX• Pre-AMP ALU• 10G injection• MUX
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VPI: Hamburg CopenhagenVPI: Hamburg - CopenhagenM
ux
Amsterdam – Hamburg –
St x
40G
Pol
M Mux EDFAAmsterdam Hamburg
Hamburg Copenhagen OSNR Filter (demux)
DSP
toring data1
G N
RZ EDFA 10G NRZ
Mux
Visualizer3
x 10
G
De-mux10G NRZ
rs
10G NRZ
• 416 km TWRS• 5 amps (dual w. access)• CD compensation
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VPI: CopenhagenVPI: CopenhagenM
ux
Amsterdam – Hamburg –
St x
40G
Pol
M Mux EDFAAmsterdam Hamburg
Hamburg Copenhagen OSNR Filter (demux)
DSP
toring data1
G N
RZ EDFA 10G NRZ
Mux
Visualizer3
x 10
G
De-mux10G NRZ
rs
10G NRZ
• OSNR adjustment and control• WSS represented by
filter/demux• PM-QPSK receiver with DSP
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Q
VPI: Assumptions and MethodVPI: Assumptions and Method
Assumptions MethodAssumptions• Noise Figure (AMP) = 5• OSNR at REC = 20
/ ½
Method• Monte Carlo approach:
50.000 bits per data point S• PMD: 0.05x10-12 s/m½
• Nonlinearity index parameter (transmission
• Simulation time usage:With nonlinearities ~ 3-4 hours per data point.
fiber): 2.4x10-20 m2/W• Nonlinearity index
parameter (DCM fiber):
Without nonlinearities ~15 minutes.
p ( )3.0x10-20 m2/W
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VPI Results:10G variation w constant 40G10G variation w. constant 40G
• XPM• Lack of SPM?
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VPI Results:10G off / 40G high power10G off / 40G high power
• Strong SPMg
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VPI results:40G variation w constant 10G40G variation w. constant 10G
• XPM• SPM
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Experimental results:50GHz spacing50GHz spacing
dBm
)G
pow
er (d
10G
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Experimental results:100GHz spacing100GHz spacing
er (d
Bm
)10
G p
owe
1
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Experimental results:150GHz spacing150GHz spacing
r (dB
m)
0G p
owe
1
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Experimental results:50HGz to 150GHz @ 10G = 20 7 dBm50HGz to 150GHz @ 10G = -20,7 dBm
The pre-FEC BER is below 10-3 unless spacing is above10 3 unless spacing is above 100GHz
The Alcatel-Lucent design guide specifies 10G = -17,2 g pin order to maintain guarantied performance according to traffic matrix!
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OAM&P standardizationOAM&P - standardization
ITU StandardizationITU Standardization• G.698.1: Multichannel DWDM applications with single-channel optical
interfaces
• G.698.2: Amplified multichannel dense wavelength division multiplexing applications with single channel optical interfaces
Scope & InfoScope & Info• To provide optical interface specifications towards the realization of
transversely compatible dense wavelength division multiplexing (DWDM) systems primarily intended for metro applications(DWDM) systems primarily intended for metro applications
• Applicable for 2,5G and 10G @ 100GHz / 50GHz spacing
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OAM&P issuesOAM&P - issues
Consequence
NREN ISSUES
Consequence
NREN TARGETS• No transverse
compatibility for newer LH modulation schemes.
• Full optical transparency• Bitrate• Modulation format
• No standardization targets LH/ULH applications
• No standardization targets
• Spacing• Full optical control
• PowerNo standardization targets OTS/OMS interworking
Power• Spectrum• Admission
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OAM&P setupOAM&P - setup
addOADCAMP WSS w ”OSA”D
A
add AMP
OADC 1:2
WSS w. OSA
WSS w ”OSA”AMP
OADC 2x4:1
B WSS 1:8EWSS w. OSAAMP C drop
40Gb PM QPSK Bitr Mod GHz Powr Spec Addm40Gb PM-QPSK Bitr Modu
GHz. Powr Spec Addm
A. Add to System ✔ ✔ ✔ ✗ ✗ ✗
B. Add to spectrum ✔ ✔ ✗ ✗ ✗ ✔
C. Control spectrum ✔ ✔ ✗ ✔ ✔ ✔
D Monitor spectrum ✔ ✔ ✗ ✗ ✗ ✗connect • communicate • collaborate
D. Monitor spectrum ✔ ✔ ✗ ✗ ✗ ✗
E. Drop from system ✔ ✔ ✗ ✔ ✗ ✗
OAM&P wrap upOAM&P wrap up
SPECTRUMSecurity ✔C t l ✔
MANAGEMENTElement Manager ✔
ALARMSNative system ✔Ali t ✔Control ✔ ✔
Network Manager ✗
Alien system ✔
REMAINING CHALLENGE• Communication between native and alien management/alarmCommunication between native and alien management/alarm
systems• Common optical design tool allowing joint network design between
different platforms with predictable performancedifferent platforms with predictable performance.
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Cost considerations:200G Amsterdam Copenhagen200G Amsterdam - Copenhagen
• 6 min/XFP• 12 min/MUX
• Guard band neglected• AW and native signals can co-
( )• 30 min/linecard• 15 min/wave config• 20/30 hours travel AW/REG
exists (Joint design rules)• Alarm and Management
integration is possible
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ConclusionConclusion
• VPI simulation platform for alien wavelength evaluation conforms qualitatively with experimental results
• 40G PM-QPSK together with 10G NRZ shows large BER variations for varying power and guard band size
• OAM&P is adequate for this mix of products, few steps are needed for “normal operation”
• Costs is for this mix of products in favour of the AW approach
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AcknowledgementsAcknowledgements
We also would like to thank SURFnet and the Gigaport3 project for their support to acquire the 40Gb/s equipment and integration work from Telindus and simulation support from CIENA.
We are grateful to NORDUnet for providing us with bandwidth and additional transponders on their DWDM link for this experiment.
The research leading to these results has received part of its funding from the European Community’s Seventh Framework Programme(FP7/2007-2013) under grant agreement nº 238875 (GÉANT)2013) under grant agreement n 238875 (GÉANT).
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