Patent ID: 7852898
Filing Date: 2010-12-14
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device comprising: a semiconductor substrate; a first semiconductor laser structure that has a first lower cladding layer, a first active layer with a first quantum well structure and a first upper cladding layer, which are formed on a first region that is a part of one main face of the semiconductor substrate and are layered in this order from the semiconductor substrate side, thereby forming a first resonator; a second semiconductor laser structure that has a second lower cladding layer, a second active layer with a second quantum well structure and a second upper cladding layer, which are formed on a second region that is different from the first region on the one main face of the semiconductor substrate and are layered in this order from the semiconductor substrate side, thereby forming a second resonator; a facet coating film that is formed on facets of the first resonator and the second resonator; and a nitrogen-containing layer that is formed between the facets of the first resonator and the second resonator and the facet coating film, wherein a layer thickness of the nitrogen-containing layer is 0.1 μm or less.