Patent ID: 6862311
Filing Date: 2005-03-01
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device comprising: a semiconductor substrate of a first conductivity type; a first cladding layer of the first conductivity type, disposed on said semiconductor substrate; an active layer disposed on said first cladding layer and having a quantum well structure and a window structure disordered proximate an outgoing end face of the semiconductor laser device; and a second cladding layer of a second conductivity type, disposed on said active layer, wherein, when the first conductivity type or the second conductivity type is n type, refractive index of a first portion of a p-type cladding layer adjacent to said active layer is smaller than refractive index of an n-type cladding layer, and refractive index of a second portion of the p-type cladding layer is larger than the refractive index of the first portion and close to the refractive index of the n-type cladding layer.