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Chirp characteristics of 40-gb/s directly Modulated distributed-feedback laser diodes

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3 Author(s)
K. Sato ; Nippon Telegraph & Telephone, NTT Corp., Kanagawa, Japan ; S. Kuwahara ; Y. Miyamoto

For short-reach applications, 40-Gb/s directly modulated semiconductor lasers enable high-capacity transmission with a simple and low-cost configuration. We investigated the chirp characteristics of 40-Gb/s directly modulated 1.55-μm distributed-feedback laser diodes (DFB-LDs) and measured the linewidth enhancement factor and dynamic chirp. We then evaluated the fiber-dispersion dependence of the bit error rates (BERs) and dispersion tolerance for 40-Gb/s transmissions.

Published in:

Journal of Lightwave Technology  (Volume:23 ,  Issue: 11 )