High power vertical external cavity surface emitting laser

摘要

gain efficiency in the quantum well layer is increased, the lasing efficiency is enhanced vertical external resonant surface-emitting laser (VECSEL) a device is disclosed. VECSEL device according to the present invention, the lower DBR mirror formed on the substrate, RPG layer formed on the lower DBR mirror, the capping layer formed on the RPG layer, the optical pump and the lower DBR mirror for irradiating pumping light to the surface of the capping layer opposite to an external resonator mirror which is installed on the outside, the RPG layer is formed of a material having the larger band gap width than the pumping light energy band gap that is provided periodically to the nodes of the standing wave (node) location, 1 includes the gain layer comprising a barrier layer and a second barrier layer provided on the upper and lower portions of the first barrier layers to be interposed with a plurality of InGaAs quantum well layer is formed of a material of the quantum well layer, respectively.