Patent ID: 6865201
Filing Date: 2005-03-08
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device comprising a substrate of nitride semiconductor, a lower clad layer of nitride semiconductor stacked thereon, an active layer stacked thereon, an upper clad layer of nitride semiconductor stacked thereon, and a contact layer of Al a In b Ga 1−a−b N stacked thereon and having a crystal lattice constant larger than a crystal lattice constant of said substrate of nitride semiconductor, wherein in said layers stacked on said substrate a waveguide in a stripe is provided, said substrate and said layers on said substrate are cleft along a plane perpendicular to a direction of said stripe in which said waveguide is provided, and along a plane parallel to a (10—10) plane of said substrate, to provide an end surface acting as a resonator mirror at an end of said waveguide.