Thermal instability of resonance absorption in inactive regions of CW CO2 lasers

Michail G. Galushkin; Vladimir S. Golubev; Alexandre M. Zabelin; Valentina Ye. Zavalova; Vladislav Ya. Panchenko

doi:10.1117/12.144607

4 May 1993 Thermal instability of resonance absorption in inactive regions of CW CO2 lasers

Michail G. Galushkin, Vladimir S. Golubev, Alexandre M. Zabelin, Valentina Ye. Zavalova, Vladislav Ya. Panchenko

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144607
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

In the optical resonators of industrial CO₂-lasers there exist stagnation zones with unexcited working mixture. In these regions the beam is partially absorbed by carbon dioxide; this results in variation of the laser beam energy and spectral characteristics. In this connection, of practical interest is the study of the unexcited mixture heating stability under various procedures of heat removal: gas mixture pumping, heat conductivity, or natural convection. For the optical thermal instability under consideration, there is an effect of thermal runaway known in chemical burning theory and emerging under self-acceleration heat release, when it cannot be compensated by heat removal.

Citation Download Citation

Michail G. Galushkin, Vladimir S. Golubev, Alexandre M. Zabelin, Valentina Ye. Zavalova, and Vladislav Ya. Panchenko "Thermal instability of resonance absorption in inactive regions of CW CO2 lasers", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144607

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