Patent ID: 7418024
Filing Date: 2008-08-26
Classification: B82Y,H01S

Abstract:
1. A vertical external cavity surface emitting laser (VECSEL) device comprising: a bottom distributed Bragg reflector (DBR) mirror formed on a substrate; a resonant periodic gain (RPG) layer formed on the bottom DBR mirror; a capping layer formed on the RPG layer; an optical pump irradiating a pump beam onto a surface of the capping layer; and an external cavity mirror installed above an external surface of a stacked layer corresponding to the bottom DBR mirror, wherein the RPG layer comprises: a plurality of first barrier layers periodically formed on nodes of a standing wave and formed of a material having a larger energy band gap width than an energy of the pump beam; and a plurality of gain layers comprising a plurality of quantum well (QW) layers formed of InGaAs material and disposed between the first barrier layers, and a plurality of second barrier layers disposed on upper and lower portions of the QW layers, wherein the first barrier layers comprise at least one of an Al