Patent ID: 7542500
Filing Date: 2009-06-02
Classification: H01S

Abstract:
1. A semiconductor laser device comprising: a first light emitting portion and a second light emitting portion provided on a substrate and having the same resonator length L, wherein each of said first light emitting portion and said second light emitting portion includes a first cladding layer of a first conductivity type, an active layer provided on said first cladding layer and a second cladding layer of a second conductivity type provided on said active layer, and has a stripe structure for injecting carriers, said stripe structure of said first light emitting portion has a section having a width changing along a resonator direction and includes a first front end face, the following relationships hold: wherein W said stripe structure of said second light emitting portion has a section having a width changing along a resonator direction and includes a second front end face, and the following relationships hold: wherein W