Patent ID: 9335483
Filing Date: 2016-05-10
CPC Classification: G02B,H01S

Claim Text:
1. An optical semiconductor resonator, comprising: a waveguide which comprises at least two areas where an effective refraction index varies in an optical axis direction of the waveguide; a diffraction grating formed along the optical axis direction of the waveguide, wherein the diffraction grating that is formed in one of the at least two areas of the waveguide where the effective refraction index is larger has a pitch narrower than a pitch of the diffraction grating that is formed in another of the at least two areas of the waveguide where the effective refraction index is smaller, wherein the waveguide comprises at least two areas where a thickness varies in the optical axis direction, and wherein the diffraction grating that is formed in one of the at least two areas of the waveguide where the thickness is larger has a pitch narrower than a pitch of the diffraction grating that is formed in another of the at least two areas of the waveguide where the thickness is smaller.