Optical nonuniformities of turbulent flow in an FAF CO2 laser active medium

Michail G. Galushkin; Vladimir S. Golubev; N. G. Dubrovin; Yuri N. Zavalov; Valentina Ye. Zavalova; Vladislav Ya. Panchenko

doi:10.1117/12.335858

5 January 1999 Optical nonuniformities of turbulent flow in an FAF CO₂ laser active medium

Michail G. Galushkin, Vladimir S. Golubev, N. G. Dubrovin, Yuri N. Zavalov, Valentina Ye. Zavalova, Vladislav Ya. Panchenko

Author Affiliations +

Proceedings Volume 3686, Laser Optics '98: Gas, Liquid, and Free-Electron Lasers; (1999) https://doi.org/10.1117/12.335858
Event: Laser Optics '98, 1998, St. Petersburg, Russian Federation

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.

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Michail G. Galushkin, Vladimir S. Golubev, N. G. Dubrovin, Yuri N. Zavalov, Valentina Ye. Zavalova, and Vladislav Ya. Panchenko "Optical nonuniformities of turbulent flow in an FAF CO₂ laser active medium", Proc. SPIE 3686, Laser Optics '98: Gas, Liquid, and Free-Electron Lasers, (5 January 1999); https://doi.org/10.1117/12.335858

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