Long-time operation of a 5kW cw CO laser

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

doi:10.1117/12.26025

1 February 1991 Long-time operation of a 5kW cw CO laser

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

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.26025
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

Investigation ofgas composition for a 5kW electric discharge cw CO laser was made to achievelong time operation. This device is a closed-cycle self-sustained discharge-excited cw CO laser with subsonic gas flow. Recirculating gas is cooled through heat exchangers operating with liquid N2. Under typical operating conditions, the laser is operated with a continuous fresh laser gas supply and a part of recirculating gas is exhausted to control operating pressure. As a result of removing contamination, especially CO2 gas, by the cold trap, continuous operation for more than 12 hours has been achieved at a power level of 5kW, with electrical conversion efficiency of 24%. Moreover, dependences of CO2 conceniration in the mixture on cathode materials were measured with a gas chromatograph. It has been revealed that the CO2 concentrations can be reduced to about a half by using the Molybdenum alloy or Tungsten alloy cathodes, when compared with the Copper ones.

Citation Download Citation

Osama Noda, Shizuma Kuribayashi, Shigenori Imatake, Motoe Kondo, Shunichi Sato, and Kunimitsu Takahashi "Long-time operation of a 5kW cw CO laser", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.26025

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