Patent ID: 6822990
Filing Date: 2004-11-23
Classification: B82Y,H01S

Abstract:
A semiconductor laser device comprising:an active layer; an n-type waveguide layer; a p-type waveguide layer; the active layer being interposed between the n-type and p-type waveguide layers; n-type and p-type cladding layers located so that outsides of the n-type and p-type waveguide layers are interposed therebetween; first current blocking portions defining a stripe-shaped current injected region extending in a direction that extends from a front facet of the device from which a laser light is emitted to a rear facet opposing thereto; and a second current blocking portion located transverse to the stripe-shaped current injected region in a vicinity of the front facet, wherein the first current blocking portions and the second current blocking portion are made of the same layer, and a refractive index waveguide structure is formed by an equivalent refractive index difference between the current injected region and regions of the first and second current blocking portions.