Long wavelength GaInAsSb-AlGaAsSb distributed-feedback lasers emitting at 2.84 µm

Abstract

Room-temperature continuous-wave operation of a singlemode GaInAsSb/GaSb/AlGaAsSb distributed feedback (DFB) laser is presented at a record long emission wavelength for this material system of 2.843 µm. The threshold current at 20°C is 75 mA. Mode selection was realised by metal gratings laterally patterned to a ridge waveguide. By varying the grating period, DFB emission from 2.738 up to 2.843 µm is obtained.