Patent ID: 7809040

Claim:
A red surface emitting laser element comprising: a substrate; a first reflector including an n-type semiconductor multilayer film; a second reflector including a p-type semiconductor multilayer film, the p-type semiconductor multilayer film comprising a low refractive index layer composed of AlAs or AlGaAs and a high refractive index layer composed of AlGaAs, and the low refractive index layer and the high refractive index layer being stacked on each other, wherein the first reflector is provided between the substrate and the second reflector; an active layer between the first reflector and the second reflector; a p-type semiconductor spacer layer between the active layer and the second reflector, the p-type semiconductor spacer layer having a thickness of 100 nm or more and 350 nm or less and containing aluminum, indium, and phosphorus; and an n-type semiconductor spacer layer between the active layer and the first reflector, wherein the active layer, the p-type semiconductor spacer layer, and the n-type semiconductor spacer layer constitute a resonator, and the resonator has an asymmetrical structure in which the active layer is not located at the center of the resonator in a cavity length direction, and wherein a thickness of the p-type semiconductor spacer layer is larger than a thickness of the n-type semiconductor spacer layer.