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Proceedings Paper

Plasma kinetic study of high-power, high-repetition-rate, closed-cycle transversely excited CO2 laser
Author(s): Hirokazu Hokazono; Minoru Obara
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Paper Abstract

We have developed a comprehensive theoretical model dealing with both variations of laser output energy and laser gas composition as a function of the repetitive laser pulse in order to evaluate the performance characteristics of the high-power, closed-cycle transversely excited (TE) CO2 laser. According to our analysis, the number of CO2 molecules decomposed per unit input energy of single discharge pulse was calculated to be 1.45x1017 molecules/J for the laser gas mixture of C02/N2/He=l5/l5/70. The number of N2 molecules decomposed per unit input energy density was calculated to be about 24000 times smaller than that of CO2. Our model theoretically predicted for the first time that a very little quantity of water vapor (<50 ppm) in the laser gas dramatically decreased the equilibrium CO2 decomposition level, resulting in increasing the laser output energy.

Paper Details

Date Published: 1 June 1990
PDF: 10 pages
Proc. SPIE 1225, High-Power Gas Lasers, (1 June 1990); doi: 10.1117/12.18503
Show Author Affiliations
Hirokazu Hokazono, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 1225:
High-Power Gas Lasers
Petras V. Avizonis; Charles Freed; Jin J. Kim; Frank K. Tittel, Editor(s)

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