We report the experimental results of an unstable ring resonator with 90-deg beam rotation for a kilowatt class chemical oxygen iodine laser (COIL). The distributions of near-field phase and far-field intensity were measured. A beam quality of 1.6 was achieved when the COIL average output power was approximately 5 kW.
© 1999 Optical Society of America
Original Manuscript: May 7, 1998
Revised Manuscript: August 25, 1998
Published: May 20, 1999
Yuqi Jin, Bailing Yang, Fengting Sang, Dazheng Zhou, Liping Duo, and Qi Zhuang, "Experimental investigation of an unstable ring resonator with 90-deg beam rotation for a chemical oxygen iodine laser," Appl. Opt. 38, 3249-3252 (1999)