High performance and high reliability of 1.55-μm current-blocking grating complex-coupled DFB lasers

We report the high performance and high reliability of the 1.55 μm current-blocking grating complex-coupled InGaAsP strained distributed-feedback MQW lasers. Small variation in slope efficiency, high characteristic temperature, and high side mode suppression ratio have been achieved over a wide temperature range of 20/spl deg/C-90/spl deg/C. From the accelerated aging test, the median life at 25/spl deg/C and 5 mW is estimated to be longer than 50 years.