Abstract
Chemical oxygen iodine laser with Microwave dischage dissociation of iodine is studied. It has been understood by the research done before that laser power was not enough enhancement. Because the high pressure of iodine mixed point causes diactivation of singlet oxygen. In this reserch, to reduce diactivation, it is shown that supersonic mixing, where oxygen flow and iodine flow are mixed at supersonic flow velocity, affect to reduce the mixing point pressure. Therefore, lamp nozzle was adopted to make up for the difficult mixing of the supersonic mixture. Chemical efficiency of 15.7 percent is obtained as a result. However, because pressure in microwave cavity point was high, dissociation was not enough, and output power enhancement is not obtained. Lower iodine pressure at the mixing point will be required to achieve the higher dissociation.