Patent ID: 6674779
Filing Date: 2004-01-06
Classification: G02B,H01S

Abstract:
A semiconductor laser device, comprising a substrate, a light emission region provided on the substrate, and an alignment stripe provided on the substrate so as to be adjacent to the light emission region, wherein:the light emission region includes a first active layer stripe having a layered structure including a first waveguide layer, an active layer, and a second waveguide layer, the active layer being interposed between the first waveguide layer and the second waveguide layer, a first buried layer having a first polarity and formed so as to cover side faces of the active layer stripe, a second buried layer having a second polarity opposite the first polarity and formed on the first buried layer, and a third buried layer having the first polarity and formed on the second buried layer and the active layer stripe; and the alignment stripe includes a second active layer stripe having a layered structure including the first waveguide layer, the active layer, and the second waveguide layer, and a selective growth mask formed on the second active layer stripe and formed of a material on which the first buried layer, the second buried layer and the third buried layer are incapable of growing.