Patent ID: 8472491
Filing Date: 2013-06-25
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device, comprising: a substrate of GaN having a stepped region made of GaN along an m-axis direction, the stepped region being formed in a semiconductor layer; and a semiconductor-layer lamination having an active layer formed over the substrate, wherein the semiconductor-layer lamination has a first region, a second region, and a planar region between the first region and the second region along an a-axis direction, a height of the first region and a height of the second region are different from each other, the planar region is formed laterally adjacent to the stepped region, and an optical waveguide is formed on the planar region along the m-axis direction, wherein the substrate has a principal plane which is the plane (0001) (C), and an angle between a plane of the planar region and the principal plane of the substrate is about 0.3°.