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Proceedings Paper

Light-induced cooling of active medium of CW TEA CO2 laser
Author(s): Viktor V. Azharonok; Irina I. Filatova; Vladimir D. Shimanovich
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Paper Abstract

In the present paper a gas kinetic temperature change of active medium of high-power TEA CO2 laser that is conditioned by a self-influence of laser radiation on plasma parameters, is investigated. The active medium was pumped by a self-sustained transverse glow discharge. The gas kinetic temperature Tg of plasma has been deduced from the half-width of rotationally unresolved spectral bands of the (2+)N2. It is shown that the laser radiation propagation through the inverse medium causes a cooling of the active medium. The degree of the gas mixture cooling δTg≈5K at W~2.2 W/2.2 W/cm3 and δTg≈60 K at W~4.4 W/cm3. We suppose that the effect of the active medium cooling is connected with the change of a kinetic of V-T relaxation in asymmetrical mode of the active medium cooling is connected with the change of a kinetic of V-T relaxation in asymmetrical mode of the active medium cooling is connected with with the change of a kinetic of V-T relaxation in asymmetrical mode of vibrationally-excited CO2 molecule when the lasing takes place in the laser resonator. Analytical estimation of light-induced temperature change δT*g of fast-flow TEA CO2-laser active medium are compared with the experimental ones.

Paper Details

Date Published: 6 October 2003
PDF: 6 pages
Proc. SPIE 5137, International Conference on Lasers, Applications, and Technologies 2002: Advanced Lasers and Systems, (6 October 2003); doi: 10.1117/12.517995
Show Author Affiliations
Viktor V. Azharonok, Institute of Molecular and Atomic Physics (Belarus)
Irina I. Filatova, Institute of Molecular and Atomic Physics (Belarus)
Vladimir D. Shimanovich, Institute of Molecular and Atomic Physics (Belarus)


Published in SPIE Proceedings Vol. 5137:
International Conference on Lasers, Applications, and Technologies 2002: Advanced Lasers and Systems
Guenter Huber; Ivan A. Scherbakov; Vladislav Ya. Panchenko, Editor(s)

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