Patent ID: 6873635
Filing Date: 2005-03-29
Classification: B82Y,H01S

Abstract:
1. A nitride semiconductor laser device, comprising: a first-conductivity-type cladding layer formed of a nitride semiconductor material; an active layer formed of a nitride semiconductor material; and a second-conductivity-type cladding layer formed of a nitride semiconductor material, wherein: the first-conductivity-type cladding layer includes a layer having a total thickness having a range larger than 0.4 μm and less than 1.15 μm and formed of a material having a refractive index lower than at least an effective refractive index of a laser oscillation mode, the layer having a total thickness having a range larger than 0.4 μm and less than 1.15 μm in the first-conductivity-type cladding layer includes at least a first-conductivity-type first cladding layer and a first-conductivity-type second cladding layer which have different compositions from each other, and the first-conductivity-type first cladding layer has a refractive index lower than the refractive index of the first-conductivity-type second cladding layer.