Patent ID: 7539230
Filing Date: 2009-05-26
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device, wherein in the device, a red-light-emission portion and an infrared-light-emission portion are provided on a single substrate, the red-light-emission portion has a double heterostructure in which a red-light-emitting active layer made of an InGaP-based material or an AlGaInP-based material is sandwiched by a first cladding layer made of an AlGaInP-based material of a first conductivity type and having a red-light-side striped portion for current injection and a second cladding layer made of an AlGaInP-based material of a second conductivity type, the infrared-light-emission portion has a double heterostructure in which an infrared-light-emitting active layer made of a GaAs-based material or an AlGaAs-based material is sandwiched by a third cladding layer made of an AlGaInP-based material of the first conductivity type and having an infrared-light-side striped portion for current injection and a fourth cladding layer made of an AlGaInP-based material of the second conductivity type, when in the first cladding layer, the second cladding layer, the third cladding layer, and the fourth cladding layer, the Al:Ga contents are represented by X the red-light-emitting active layer and the infrared-light-emitting active layer each have a quantum well structure, and in at least one end face of a resonator contained in each of the red-light-emission portion and the infrared-light-emission portion, the red-light-emitting active layer and the infrared-light-emitting active layer are each provided with a window region in a disordered state made by impurity introduction of Zn as an impurity.