CO2 gas dynamic laser driven by methane-air combustion

Yoshinori Itaya; Yousuke Kawamura; Noriyuki Kobayashi; Chihomi Takami; Masanobu Hasatani

doi:10.1117/12.270106

4 April 1997 CO₂ gas dynamic laser driven by methane-air combustion

Yoshinori Itaya, Yousuke Kawamura, Noriyuki Kobayashi, Chihomi Takami, Masanobu Hasatani

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270106
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

The carbon-dioxide gas dynamic laser driven by methane-air combustion in an unsteady flame propagation combustor was proposed for the purpose of industrial application. The effect of coexisting water with high concentration on the population balance between carbon-dioxide(001) and carbon-dioxide(100) levels of vibration-rotation modes was theoretically analyzed. The analysis showed that the population inversion between the two levels can take place with the methane-air combustion at stoichiometric ratio if the gas flow is accelerated to Mach number 5.0. The population inversion was confirmed by the experimental measurement of the small-signal gain carried out applying the unsteady flame propagation combustion. High emission power of about 2.5 kW with the path length of 0.3 m may be expected from the magnitude of the gain.

Citation Download Citation

Yoshinori Itaya, Yousuke Kawamura, Noriyuki Kobayashi, Chihomi Takami, and Masanobu Hasatani "CO₂ gas dynamic laser driven by methane-air combustion", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270106

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