Patent ID: 7477669
Filing Date: 2009-01-13
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device which emits a plurality of laser lights having different wavelengths, said device comprising: a first laser oscillation section laminated on a semiconductor substrate; and a second laser oscillation section which oscillates at a wavelength different from the first laser oscillation section; wherein the first laser oscillation section's one surface located away from the semiconductor substrate and excluding its waveguide is fixedly combined with the second laser oscillation section's one surface located close to its light emitting portion and excluding its waveguide by virtue of insulating adhesive layers; said semiconductor laser device further comprises: first and second ohmic electrode layers formed on the surfaces of waveguides of the first and second laser oscillation sections; and first and second wiring layers formed between the first and second laser oscillation sections, electrically and individually connected with the first and second ohmic electrode layers, wherein the first laser oscillation section or the semiconductor substrate is partially exposed when viewed from the second laser oscillation section side, with the first and second wiring layers extending on the surface of the exposed portion, and wherein an insulating layer consisting of a material different from the adhesive layers is formed between the first wiring layer and the first laser oscillation section except an area of the ohmic electrode layer.