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Proceedings Paper

Effects of absorption and relaxation on CO2 impurities in pulsed DF/HF lasers
Author(s): Michail A. Azarov; V. A. Drozdov; Georgiy A. Troshchinenko
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Paper Abstract

Influence of CO2 impurity within the laser medium on energy and spectral characteristics of the pulsed chemical chain DF-laser has been investigated experimentally. It is shown, that the mechanism of CO2 influence on the output laser characteristics and their sensitivity to CO2 concentration depends in a strong degree on lasing conditions. The influence of the CO2 molecule is determined only by relaxation processes and the sensitivity is minimal when the transition only between the low vibrational levels radiate in wavelength range of 3.6 - 4.2 micrometer due to low resonator quality. With low CO2 concentration and use of the high quality resonator the DF-laser generates on up to ten vibrational transitions in the wavelength range of 3.6 - 5.0 micrometer, thus the high efficiency of transformation of the reserved chemical energy in lasing is provided. In this case the CO2 influence on the DF-laser characteristics is defined both the relaxation processes and to greater degree the CO2 absorption in the range of 4.2 - 4.4 micrometer, and the sensitivity grows almost by the order of magnitude. On the basis of the investigations carried out the requirements to a degree of clearing of a laser medium from technological CO2 impurity for achievement of high specific energies of HF- and DF-lasers are determined [(CO2) less than 0.4 and 0.005%, correspondingly].

Paper Details

Date Published: 22 December 1998
PDF: 6 pages
Proc. SPIE 3574, XII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (22 December 1998); doi: 10.1117/12.334497
Show Author Affiliations
Michail A. Azarov, Russian Scientific Ctr. of Applied Chemistry (Russia)
V. A. Drozdov, Russian Scientific Ctr. of Applied Chemistry (Russia)
Georgiy A. Troshchinenko, Russian Scientific Ctr. of Applied Chemistry (Russia)

Published in SPIE Proceedings Vol. 3574:
XII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference
Anatoly S. Boreisho; Gennady A. Baranov, Editor(s)

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