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

• DOI: 10.1109/jlt.2005.857753
• Publication Date: 2005-12-22T17:51:48Z
• Authors: K. Sato; S. Kuwahara; Y. Miyamoto
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

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-/spl mu/m 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.