Patent ID: 6842470
Filing Date: 2005-01-11
Classification: H01S

Abstract:
1. A nitride-type semiconductor laser device, comprising a substrate and a layered structure provided on the substrate, wherein: a light absorption layer having a bandgap smaller than a bandgap of an active layer in the layered structure is provided in a position between a cladding layer, which is provided on a side opposite to a mount surface with respect to the active layer, and a surface of the layered structure which is positioned on a side opposite to the mount surface, an opaque electrode is provided on a part, but not the entirety, of the surface of the layered structure which is positioned on a side opposite to the mount surface, and a light path which is traveling from the active layer to the surface which is positioned on a side opposite to the mount surface of the layered structure is arranged so as to be either completely absorbed by the light absorption layer or blocked by the opaque electrode; wherein the light absorption layer has the same conductivity type as that of the adjacent layers.