CW operation of DFB-BH GaInAsP/InP lasers in 1.5 μm wavelength region

Distributed-feedback buried heterostructure (DFB-BH) GaInAsP/InP lasers in the 1.5 μm wavelength region have been operated continuously at heat-sink temperatures as high as 310 K. A threshold current of 55 mA at 300 K and single longitudinal mode operation have been obtained.