Current status of industrial COIL development

The chemical oxygen iodine laser (hereafter referred to as COIL) has been attracting attention for its potential on the usage for material processing. The completion of the COIL for material processing with such systems as the fuel recirculation equipment, continuous water vapor trapping facilities, and so on, is informed. The suitable resonator design is investigated. The experimental test was carried out with the stable-unstable resonator and a high quality beam of near diffraction limit at the unstable side was achieved. Now, the possibility of the COIL for processing is actually ascertained.