Patent ID: 7756179

Claim:
A semiconductor laser apparatus including: an n-type cladding layer, an n-type cladding layer side guide layer, an active layer, a p-type cladding layer side guide layer, and a p-type cladding layer, wherein electrons and holes are injected into said active layer, transverse to said active layer, through said n-type cladding layer side guide layer and said p-type cladding layer side guide layer, said n-type cladding layer side guide layer and said p-type cladding layer side guide layer are not doped with impurities in the course of crystal growth and wafer processing, said p-type cladding layer side guide layer is thinner than said n-type cladding layer side guide layer, and the refractive index of said p-type cladding layer side guide layer is higher than the refractive index of said n-type cladding layer side guide layer.