Temperature Dependance of the Bandwidth of Buried Heterostructure Distributed Feedback Lasers.

The etched mesa buried heterostructure (EMBH) distributed feedback lasers fabricated using semi-insulating InP blocking layers have bandwidths in the 12 to 15 GHz range at 20C, 15 mW. The bandwidth usually decreases with increasing temperature. For the practical range of interest from 20C to 40C, the observed decrease in bandwidth is 0.5 to 2 GHz at 15 mW output power. A large sublinearity in the light vs. current characteristics is generally associated with a rollover in the bandwidth power curve.