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Proceedings Paper

Optical nonuniformities of turbulent flow in an FAF CO2 laser active medium
Author(s): Michail G. Galushkin; Vladimir S. Golubev; N. G. Dubrovin; Yuri N. Zavalov; Valentina Ye. Zavalova; Vladislav Ya. Panchenko
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Paper Abstract

The luminescent method and the method of double-beam shear interferometry were used to measure the spatial and temporary characteristics of density fluctuations of the turbulent flow in the CO2 laser tube with fast-axial flow under the conditions of dc discharge. The amplitude dependence of the small-scale optical nonuniformities of the laser mixture on the discharge input has been determined. The analysis of influence of the thermo-ionized instability of the discharge on the small-scale nonuniformities of gas density has been carried out. The method of frequency selection of the registered signal has been used for selection of a turbulent component of the gas-density fluctuations.

Paper Details

Date Published: 5 January 1999
PDF: 9 pages
Proc. SPIE 3686, Laser Optics '98: Gas, Liquid, and Free-Electron Lasers, (5 January 1999); doi: 10.1117/12.335858
Show Author Affiliations
Michail G. Galushkin, NICTL Laser Research Ctr. (Russia)
Vladimir S. Golubev, NICTL Laser Research Ctr. (Russia)
N. G. Dubrovin, NICTL Laser Research Ctr. (Russia)
Yuri N. Zavalov, NICTL Laser Research Ctr. (Russia)
Valentina Ye. Zavalova, NICTL Laser Research Ctr. (Russia)
Vladislav Ya. Panchenko, NICTL Laser Research Ctr. (Russia)

Published in SPIE Proceedings Vol. 3686:
Laser Optics '98: Gas, Liquid, and Free-Electron Lasers
Oleg B. Danilov, Editor(s)

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