Patent ID: 6711191
Filing Date: 2004-03-23
Classification: B82Y,H01S

Abstract:
An effective refractive index type nitride semiconductor laser device comprising:a. an active layer for recombining electrons and holes; b. p-side contact layer for contacting a p-side electrode; c. a p-side optical waveguide layer and a p-side cladding layer between said active layer and said p-side contact layer; a stripe-ridge-waveguide provided by selectively etching said p-side contact layer, said p-side cladding layer and said p-side optical waveguide layer up to a vicinity of said active layer, and another p-side cladding layer between said active layer and said p-side optical waveguide layer, wherein said p-side optical waveguide layer has a thickness of 1.0 &mgr;m or less at a projection region of a stripe structure included in said stripe-ridge-waveguide, and said p-side optical waveguide layer has a thickness of 0.05 &mgr;m or more and 0.1 &mgr;m or less at a region other than the projection region, and said another p-side cladding layer near the active layer is a carrier confinement layer including AlyGa1âˆ’yN(0zGa1âˆ’zN(0z).