SEMICONDUCTOR LASER DEVICE

摘要

The semiconductor laser device the n-InP cladding layer, SCH-MQW active layer, p-InP cladding layer, and p-GaInAsP optical waveguide layer are respectively formed into a tapered shape on the n-InP substrate . The combination of oscillation parameters of the tapered shape, the grating pitch of a diffraction grating, an optical waveguide including an active layer, and the length of a resonator are adjusted so that laser beam including two or more oscillating longitudinal modes are output.