Vertical cavity surface emitting laser

A vertical cavity surface emitting laser comprising:

• a laser structure in which (1) a first multilayer film reflector, (2) an active layer having a light emitting central region, (3) a second multilayer film reflector, and (4) a transverse mode adjustment layer, are layered in this order on a substrate,
• wherein,
• one of the first multilayer film reflector and the second multilayer film reflector has a quadrangle shaped current injection region having in-plane anisotropy, in which an intersection of diagonal lines corresponds to the light emitting central region,
• the quadrangle shaped current injection region is a current aperture formed of an oxidized region,
• the second multilayer film reflector has a light emitting window provided in a region corresponding to one diagonal line of the quadrangle shaped current injection region and a pair of grooves provided in the second multilayer film reflector and the quadrangle shaped current injection region in the second multilayer film reflector with the light emitting window in between,
• the transverse mode adjustment layer is provided correspondingly to the light emitting window,
• reflectance of a peripheral region, which is a region of the light emitting window other than a central region corresponding to the light emitting central region, is lower than that of the central region,
• a portion of the transverse adjustment layer is formed on the central region and includes a first adjustment layer and a second adjustment layer,
• a portion of the transverse mode adjustment layer is formed on the peripheral region and includes a third adjustment layer, and
• the first adjustment layer comprises an oxide and each of the second adjustment layer and the third adjustment layer comprises a nitride.