Extremely low power penalty in 2.5‐Gb/S transmission experiment using 1.55‐μm MQW‐DFB lasers with optimized QW number

Abstract

For 1.55‐μm MQW‐DFB lasers, the dependence of transmission characteristics under 2.5‐Gb/s modulation on the number of wells is investigated experimentally and theoretically. The fiber length is 70 km and the total dispersion is 1470 ps/nm. Extremely low power penalty of 1.3 dB is obtained for a 12‐well laser with large differential gain of 7.1 × 10−16 cm2. © 1994 John Wiley & Sons, Inc.