Patent ID: 7129512
Filing Date: 2006-10-31
Classification: H01S

Abstract:
1. A semiconductor laser device, comprising: a radiating body having one main surface; a first conductivity type first semiconductor layer of a first conductivity type disposed on the main surface of said radiating body, said first semiconductor layer having a first main surface opposite to the main surface of said radiating body and a second main surface opposite to the first main surface with respect to each other; an active layer disposed on the second main surface of said first semiconductor layer, said active layer having a first main surface opposite to the second main surface of said first semiconductor layer and a second main surface opposite to the first main surface of said active layer with respect to each other; and a second conductivity type second semiconductor layer of a second conductivity type disposed on the second main surface of said active layer, said second semiconductor layer having a first main surface opposite to the second main surface of said active layer and a second main surface opposite to the first main surface of said second semiconductor layer with respect to each other, wherein an effective refractive index between the first main surface of said active layer and the first main surface of said first semiconductor layer is lower than an effective refractive index between the second main surface of said active layer and the second main surface of said second semiconductor layer, and a thermal resistance between the first main surface of said active layer and the first main surface of said first semiconductor layer is smaller than a thermal resistance between the second main surface of said active layer and the second main surface of said second semiconductor layer.