Efficient room-temperature operation of a fast-axial-flow rf-discharge-excited CO laser is described. A steady-state laser output of 268 W has been obtained with a CO/N2/He/Xe/O2 mixture from a 19-mm-diameter, 300-mm-long discharge. The corresponding electrical conversion efficiency and the specific laser output are as high as 13.5% and 3.15 W/cm3, respectively. The role of Xe in the mixtures is discussed. The specific laser output achieved is comparable with those of the high-power industrial CO2 lasers in which a similar excitation scheme is applied.
© 1994 Optical Society of America
Original Manuscript: January 10, 1994
Published: May 15, 1994
Shunichi Sato, Kouki Shimizu, and Kojiro Shimamoto, "Efficient room-temperature CO laser with high specific output," Opt. Lett. 19, 719-721 (1994)