Patent ID: 8842708
Filing Date: 2014-09-23
Classification: B82Y,G11B,H01S

Abstract:
1. A light oscillation device comprising: a self oscillation semiconductor laser that has a double quantum well separated confinement heterostructure made of GaInN/GaN/AlGaN materials and that includes a saturable absorber section which is applied with a negative bias voltage and a gain section into which a gain current is injected, wherein a p type GaInN guide layer, a p type AlGaN clad layer, a p type AlGaN barrier layer, and a p type GaN/AlGaN superlattice clad layer are sequentially formed in the self oscillation semiconductor laser; a light separation means for separating a portion of laser light beams from the self oscillation semiconductor laser; a light sensing element that senses the laser light beams separated by the light separation means; and a current control circuit which controls a current injected into the gain section of the self oscillation semiconductor laser based on an amount of the laser light beams which are sensed by the light sensing element.