High output power quarter-wavelength shifted distributed feedback laser diode

摘要

The present invention discloses a phase shift distribution feedback laser diode. Its laser diode includes a substrate having a laser diode region and a phase adjustment region, a waveguide layer on the substrate, a cladding layer on the waveguide layer, grating in the cladding layer of the laser diode region, and adjacent to the laser diode region The substrate, the waveguide layer, and an antireflection film disposed on one sidewall of the clad layer, and a high reflection film disposed on the other sidewall of the substrate, the waveguide layer, and the clad layer adjacent to the phase adjustment region.