Patent ID: 7860138

Claim:
A semiconductor laser emitting device comprising: a single substrate made of n-type GaAs and including an upper surface; an infrared laser emitting element for infrared light emission, the infrared laser emitting element including a laminate made up of a first lower clad layer, a first active layer and a first upper clad layer; and a red laser emitting element for red light emission, the red laser emitting element including a laminate made up of a second lower clad layer, a second active layer and a second upper clad layer; the infrared laser emitting element and the red laser emitting element being provided on the upper surface of the substrate, wherein the first lower clad layer comprises: a third lower clad layer made of n-type AlGaAs and formed entirely on the upper surface of the substrate; an etching stop layer formed entirely on an upper surface of the third lower clad layer; and a fourth lower clad layer formed on and held in direct contact with an upper surface of the etching stop layer at a region provided with the infrared laser emitting element, the fourth lower clad layer being made of n-type AlGaAs, and wherein the second lower clad layer is formed on the upper surface of the etching stop layer except the region provided with the infrared laser emitting element.