Patent ID: 9219349
Filing Date: 2015-12-22
Classification: H01S,H04B

Abstract:
1. A surface emitting semiconductor laser comprising: a substrate; a first semiconductor multilayer reflector formed on the substrate, and including laminated pairs of a high refractive index layer having a relatively high refractive index and a low refractive index layer having a relatively low refractive index; an active region formed on or above the first semiconductor multilayer reflector; a second semiconductor multilayer reflector formed on or above the active region, and including laminated pairs of a high refractive index layer having a relatively high refractive index and a low refractive index layer having a relatively low refractive index; and a cavity extending region formed between the first semiconductor multilayer reflector and the active region or between the second semiconductor multilayer reflector and the active region, having an optical film thickness greater than an oscillation wavelength, extending a cavity length, and including a conductive semiconductor material, wherein the cavity extending region includes an optical loss causing layer at the position of at least one node of a standing wave of a selected longitudinal mode, and wherein the semiconductor material forming the cavity extending region has a composition in which a semiconductor material forming the optical loss causing layer and a semiconductor material forming a layer other than the optical loss causing layer are equal in composition.