Patent ID: 7596163
Filing Date: 2009-09-29
Classification: B82Y,H01S

Abstract:
1. A vertical-cavity surface-emitting laser diode (VCSEL) comprising: a substrate; a first semiconductor multilayer of a first conductivity-type; an active layer; a second semiconductor multilayer of a second conductivity-type, the second semiconductor multilayer constituting a resonator together with the active layer and the first semiconductor multilayer; a contact layer; each of the layers being stacked on the substrate, and a metal layer formed on the contact layer, the metal layer including an opening portion that defines a region that emits laser light; and when oscillation wavelength of the laser light is λ, optical thickness T of the contact layer and a top layer of the second semiconductor multilayer that contacts with the contact layer is in a range from about 0.193 λ to about 0.197 λ and is out of a range from about 0.153 λ to about 0.157 λ, the contact layer covering the entire surface of the top layer.