Characteristics of a downstream-mixing CO2 gas-dynamic laser

Takashi Hashimoto; Susumu Nakano; Michio Hachijin; Katsuhiko Komatsu; Hiroshi Hara

doi:10.1117/12.25979

1 February 1991 Characteristics of a downstream-mixing CO2 gas-dynamic laser

Takashi Hashimoto, Susumu Nakano, Michio Hachijin, Katsuhiko Komatsu, Hiroshi Hara

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25979
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

The performance of a combustion-driven downstream-mixing C02 gasdynamic laser (GDL) has been developed. A small-signal gain coefficient up to 0.6%cm-1 and a laser output power as high as 11 kW have been measured, on the condition that the total mass flow rate and combustion gas temperature were about 2 kg/s and 1750 K, respectively. To explain the difference between the experimental data and the expected potential, a mixing loss factor was previously introduced. In the present study, further experiments and a numerical analysis are conducted to clarify the phenomena in the laser cavity. Consequently, it is made clear that, under the existent circumstances of supersonic nozzle manufacturing technology, two supersonic flows will not mix well.

Citation Download Citation

Takashi Hashimoto, Susumu Nakano, Michio Hachijin, Katsuhiko Komatsu, and Hiroshi Hara "Characteristics of a downstream-mixing CO2 gas-dynamic laser", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25979

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