Low-threshold and high temperature single-longitudinal-mode operation of 1.55 μm-band DFB-DC-PBH LDs

Abstract
1.55 μm-band distributed-feedback laser diodes with double-channel planar buried heterostructure (DFB-DC-PBH LDs) have been developed. As well as low threshold current, 19 mA at room temperature, stable CW single-longitudinal-mode operation up to the high power level of 23 mW and the high temperature of 108°C has been obtained.