Patent ID: 7746912
Filing Date: 2010-06-29
Classification: B41J,G02B,H01S

Abstract:
1. A vertical cavity surface emitting laser element comprising: a substrate; a first semiconductor multilayer reflector including a plurality of pairs of layers, the layers of each pair having differing refractive indexes and thermal resistances from each other; a resonator region including an active layer; and a second semiconductor multilayer reflector including a plurality of pairs of layers, the layers of each pair having differing refractive indexes and thermal resistances from each other; wherein at least one pair of layers of at least one of the first semiconductor multilayer reflector and the second semiconductor multilayer reflector includes a first layer with a lower thermal resistance that has an optical thickness greater than one fourth (¼) of an oscillation wavelength and a second layer with a higher thermal resistance that has an optical thickness less than one fourth (¼) of the oscillation wavelength; and a sum of the optical thickness of the first layer and the optical thickness of the second layer is equal to m/4 times the oscillation wavelength where m denotes an even number greater than or equal to two (2), wherein the resonator region includes a plurality of spacer layers, and at least one of the plurality of spacer layers contains indium and the at least one of the plurality of spacer layers has a portion thereof removed down to a mid level in a depth direction of the at least one of the plurality of spacer layers.