Welcome to the second edition of Finisar Instrumentation News – a regular publication

that aims to keep you up to date with all things WaveShaper-related.

This newsletter showcases the upgraded WaveShaper 100S Tunable Optical Filter and introduces the new WaveManager 2.5 software package. This package includes a number of enhancements which will be of interest to most users of WaveShaper instruments. For example the new WaveSketch software allows creating and shaping your optical filters just by drag-and-drop using your computer's mouse!

WAVESHAPER 100S TUNABLE OPTICAL FILTERWe are pleased to announce a significant upgrade of our WaveShaper 100S

instrument.

The new WaveShaper 100S Tunable Optical Filter is a tunable, bandpass optical filter with a bandwidth that is adjustable between 10 GHz and 1000 GHz The filter shape is software-selectable to have either a flat-top or Gaussian shape. Both filter center frequency and filter bandwidth are continuously variable in 0.1 GHz steps or, alternatively, the center

frequency can be accurately aligned with the ITU G.964 grid for selecting a particular channel.

The WaveShaper 100S is optimized for use in production test applications where the precise control over both the bandwidth and center frequency ensures support for both current test requirements as well as for next generation Flexgrid™ - based networks and subsys-tems. For test development, the WaveShaper 100S can be controlled using Finisar’s intuitive WaveManager graphical user interface. For high-throughput test environments,

the simple Application Programming Interface supports multiple programming environments for both Windows and Linux (for further details please see the Hints and Tips section below).

The WaveShaper 100S Tunable Optical Filter starts shipping in January 2013. For further details please contact your local Finisar Test & Measurement sales partner or email us at waveshaper@finisar. com.

WAVEMANAGER 2.5 APPLICATION SOFTWAREVersion 2.5 of the WaveManager Application Software package will be released on December 20th. This upgrade provides a number of new capabilities to users of the WaveShaper family, including support for the new WaveSketch and Fourier Processing capabilities which are explained in this newsletter. The package supports Windows operating systems (XP/Vista/7) and is available free of charge for download from Finisar’s Test & Measurement web page at www.finisar.com/instruments.

CONTENTS

WaveShaper 100S TunableOptical Filter

WaveManager 2.5 ApplicationSoftware Package

Fourier Processor: An OpticalFPGA

WaveSketch: Drag-and-Dropcontrol of filter shapes

Hints and Tips: Using theWaveShaper ApplicationProgramming Interface

KEEP UP TO DATEKeep up to date with Finisar

technology discussions andnews on our blog at:www.finisar.com/lightspeed

INSTRUMENTATION NEWS WINTER 2012

Editor: Ralf Stolte ralf.stolte@finisar.com +49 170 415 6319

Programmable filter bandwidth in WaveShaper 100S Tunable Optical Filter

Frequency Offset (THz)

Check for new software andApplication Notes at:

VISIT US AT OFCOFC/NFOEC, Anaheim, March

19-21, 2013

Check out our latest videoon YouTube:http://www.youtube.com/watch?v=YxHPJ1QfZI4

www.finisar.com/instruments

FINISAR INSTRUMENTATION NEWS - WINTER 2012

©2012 Finisar Corporation. All rights reserved. Finisar is a registered trademark of Finisar Corporation.

1389 Moffett Park DriveSunnyvale, CA 94089, USAEmail: waveshaper@finisar.comwww.finisar.com/instruments

FOURIER PROCESSING - THE OPTICAL FPGA!Fourier processing is an amazing new capability of the WaveShaper 4000 that allows the user to split an input signal between multiple output ports. Simple structures like wavelength-dependent couplers and splitters can be created with user defined coupling ratios and frequency dependency. In addition to just splitting the power, the phase of the signals in the different ports can also be adjusted. This allows the user to create, on the fly, more complex structures like Delay Line Interferometers (e.g. DPSK-Demodulator - shown on right) or DQPSK-Demodulators with a variable, easily-programmable, optical transfer function (below).

We have been working on this capability with leading edge research groups (see e.g. "LCOS based WaveShaper technology for optical signal processing and performance monitoring ", Schröder, J. et al, Proc OECC 2012, Korea, July 2012) and one of the researchers described the capa-bility as “… just like an Optical FPGA”- a term we think describes the capabilities of the Fourier Processor quite nicely! The ability to easily generate complex interferometric structures simplifies many areas of research which require an arbitrary optical transfer function including the ability to share (or combine) power between multiple ports.

Fourier Processing is built into WaveManager 2.5 and supported on all newly shipped WaveShaper 4000 Programmable Optical Processors. For existing units, upgrades will be available. Please contact your Finisar Test & Measurement sales partner or send an email to WaveShaper@finisar.com for further information.

WAVESKETCHWaveSketch is an exciting new capability which enables users of the WaveShaper 1000 and 4000 to manually create filter shapes using a ‘drag and drop’ graphical interface. As the filter curve is manipulated on the screen, the WaveShaper transfer function is updated in real time thus allowing, for example, continuous adjustments to eliminate drift in system test applications

The figure on the right shows a WaveSketch screenshot in which defined points can be added, deleted or modified as required. The filter shapes generated in WaveSketch can be saved in the WaveShaper *.wsp format and then re-used in either WaveSketch or WaveManager.

WaveSketch supports all versions of the WaveShaper 1000 and 4000 and users of these instruments can access WaveSketch sim-ply by upgrading to WaveManager 2.5.

HINTS AND TIPSDid you know that the WaveShaper family of instruments can be controlled through an Application Programming Interface (API)? This interface allows complete control of the units from programming platforms like Matlab, Excel or LabVIEW and is supported under both Windows and Linux. Details of how to program filter shapes are available in the application note “WaveShaper - Creating Simple Filter Shapes in Excel, LabVIEW and MATLAB” which is available at www.finisar.com/instruments.

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Optical transfer function of a DQPSK demodulator generated in a WaveShaper 4000S using the Fourier Processor software

Screenshot of WaveSketch application showing user-defined filter shape created by the WaveSketch drag and drop interface