Patent ID: 8472494

Claim:
A semiconductor laser comprising: a first portion, made from a silicon-containing material, including an optical waveguide, a first diffraction grating having a phase shift, and a second diffraction grating; a second portion including a light-emitting layer made from a material different from that of the first portion; a laser region defined from the first diffraction grating, and the optical waveguide and the light-emitting layer provided in a position corresponding to the first diffraction grating; and a mirror region defined from the second diffraction grating, and the optical waveguide and the light-emitting layer provided in a position corresponding to the second diffraction grating, wherein the first diffraction grating and the second diffraction grating are continuously provided along the optical waveguide, and the second portion covers a whole of the first diffraction grating and the second diffraction grating and extends outward a distance further than the first diffraction grating and the second diffraction grating.