High-power unstable resonator CO laser

Shunichi Sato; Kunimitsu Takahashi; Ikuzo Tanaka; Osama Noda; Shizuma Kuribayashi; Shigenori Imatake; Motoe Kondo

doi:10.1117/12.25905

1 February 1991 High-power unstable resonator CO laser

Shunichi Sato, Kunimitsu Takahashi, Ikuzo Tanaka, Osama Noda, Shizuma Kuribayashi, Shigenori Imatake, Motoe Kondo

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25905
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

The operating characteristics of a multikilowatt unstable resonator CO laser are described. A positive-branch confocal unstable resonator was applied to a large-volume, transverse, self-sustained dc glow discharge-excited cw CO laser with a closed-cycle, subsonic gas flow. Output power and near-field beam properties were measured for various geometrical output couplings. An output of 5.0 kW has been obtained for a coupling of 0.25 (magnification M=1.16) with an electrical conversion efficiency of 16.9%. It has been revealed that the output from the unstable resonator is comparably high to that from the stable resonator under the same gas and discharge conditions. The output beam patterns and the sensitivity of power to angular misalignment of the mirrors are also reported.

Citation Download Citation

Shunichi Sato, Kunimitsu Takahashi, Ikuzo Tanaka, Osama Noda, Shizuma Kuribayashi, Shigenori Imatake, and Motoe Kondo "High-power unstable resonator CO laser", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25905

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