Patent ID: 8130805

Claim:
A semiconductor laser apparatus comprising: a substrate; a first-conductivity type layer formed on the substrate; an active layer formed on the first-conductivity type layer; a second-conductivity type layer formed on the active layer and having a ridge extending along an optical waveguide direction; and a current blocking layer formed on the second-conductivity type layer on sides of the ridge, wherein the ridge is disposed to separate the substrate into a first region having a first width, and a second region having a second width greater than the first width, in a direction perpendicular to the optical waveguide direction, the second-conductivity type layer further has a shock attenuating portion having a height greater than or equal to a height of the ridge, on sides of the ridge, and in the second region, a trench extending from an upper surface of the shock attenuating portion, penetrating at least the active layer, and reaching the first-conductivity type layer, is formed along the optical waveguide direction.