Patent ID: 7903709
Filing Date: 2011-03-08
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device comprising: a substrate; and a semiconductor layer formed on a surface of said substrate and having a waveguide extending in a first direction parallel to said surface, wherein said waveguide is formed on a region approaching a first side from a center of said semiconductor laser device in a second direction parallel to said surface and intersecting with said first direction, a first region separated from said waveguide on a side opposite to said first side of said waveguide and extending parallel to said first direction is provided in said semiconductor layer, a second region is provided between said waveguide and said first region, a first recess portion separated from said waveguide on an extension of a facet of said waveguide is formed in an upper surface of said semiconductor layer and extends in said second direction from said first region to said second region, and a thickness of said first region is smaller than a thickness of said second region.