A New Kinetic Model for Assessing the Performance of Advanced CO 2 Gasdynamic Lasers

A theoretical analysis of CO 2 gasdynamic laser ( CO 2 -GDL) performance using a six-temperature model is described in this paper. This model has specifically included vibrational transfer processes associated with vibrational non equilibrium of O 2 and H 2 O so that the kinetic behaviors of these s...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1994-03, Vol.33 (3R), p.1340
Main Authors: Ebina, Kosuke, Yokozawa, Takeshi, Yamaguchi, Shigeru, Kanazawa, Hirotaka, Hara, Hiroshi, Mine, Yasuharu, Komatsu, Katsuhiko, Saito, Hideaki
Format: Article
Language:English
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Summary:A theoretical analysis of CO 2 gasdynamic laser ( CO 2 -GDL) performance using a six-temperature model is described in this paper. This model has specifically included vibrational transfer processes associated with vibrational non equilibrium of O 2 and H 2 O so that the kinetic behaviors of these species in an active laser medium can be properly assessed. The calculation carried out with this model showed that presence of O 2 in the laser medium together with H 2 O reduces the population inversion. Consequently, under the condition where the concentration of H 2 O was ∼4 mol%, every additional percent of O 2 was found to be about one percent reduction in the small signal gain of a CO 2 -GDL. The calculation resulted in good agreement with experimental studies in the variation of the small signal gains as well as vibrational temperatures for various laser gas composition.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.33.1340