Wavelength-Routed Switching for 25-Gbit/s Optical Packets Using a Compact Transmitter Integrating a Parallel-Ring-Resonator Tunable Laser and an InGaAlAs EAM

Toru SEGAWA  Wataru KOBAYASHI  Tatsushi NAKAHARA  Ryo TAKAHASHI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E97-C   No.7   pp.719-724
Publication Date: 2014/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E97.C.719
Type of Manuscript: INVITED PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
tunable laser,  electro-absorption modulator,  optical packet switching,  photonic integrated circuits,  

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Summary: 
We describe wavelength-routed switching technology for 25-Gbit/s optical packets using a tunable transmitter that monolithically integrates a parallel-ring-resonator tunable laser and an InGaAlAs electro-absorption modulator (EAM). The transmitter provided accurate wavelength tunability with 100-GHz spacing and small output power variation. A 25-Gbit/s burst-mode optical-packet data was encoded onto the laser output by modulating the integrated EAM with a constant voltage swing of 2 V at 45°C. Clear eye openings were observed at the output of the 100 GHz-spaced arrayed-waveguide grating with error-free operation being achieved for all packets. The tunable transmitter is very promising for realizing a high-speed, large-port-count and energy-efficient wavelength-routing switch that enables the forwarding of 100-Gbit/s optical packets.