Patent ID: 7126977

Claim:
A surface emitting semiconductor laser including a resonator formed on a substrate and emitting a laser beam toward a direction vertical to the substrate from an emitting surface formed on an upper surface of the resonator, the resonator including: a first mirror formed above the substrate; an active layer; and a second mirror located oppositely to the first mirror and sandwiching the active layer therebetween; a reflectivity adjustment layer that is formed on the emitting surface; the second mirror including a layer of which an optical thickness is m 1 λ/2 (m 1 , a natural number >0), when a wavelength of the laser beam is λ; and an optical thickness of the reflectivity adjustment layer being (2 m 2 −1) λ/4 (m 2 , a natural number >0), the layer of which the optical thickness is m 1 λ/2 is formed in whole area of the second mirror, the reflectivity adjustment layer is formed within a part of an aperture formed on the upper surface of the resonator.