Turbulent structure of the active medium of a fast-flow CO{sub 2} laser

The characteristics of turbulent pulsations of the gas density and velocity and the structural characteristic of fluctuations of the refractive index C{sub n}{sup 2} in the gaseous-mixture flow of a fast-axial-flow CO{sub 2} laser are determined using optical diagnostic methods: the luminescence, in...

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Bibliographic Details
Published inQuantum electronics (Woodbury, N.Y.) Vol. 33; no. 8
Main Authors Galushkin, M G, Golubev, V S, Zavalov, Yu N, Panchenko, Vladislav Ya, Dubrov, V D, Buyarov, S A, Grishaev, R V, Ionin, Andrei A, Kotkov, A A, Korolenko, P V
Format Journal Article
LanguageEnglish
Published United States 31.08.2003
Subjects
BEAM DYNAMICS
CARBON DIOXIDE LASERS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DENSITY
DYNAMICS
ELECTRON TUBES
EMISSION
ENERGY
FLUCTUATIONS
FREQUENCY MIXING
GAS DISCHARGE TUBES
GAS LASERS
HEAT
INTERFEROMETRY
LASERS
LUMINESCENCE
MECHANICS
NONLINEAR PROBLEMS
OPTICAL PROPERTIES
OSCILLATIONS
PHASE OSCILLATIONS
PHOTON EMISSION
PHYSICAL PROPERTIES
PULSATIONS
REFRACTIVE INDEX
VARIATIONS
VELOCITY
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Summary:The characteristics of turbulent pulsations of the gas density and velocity and the structural characteristic of fluctuations of the refractive index C{sub n}{sup 2} in the gaseous-mixture flow of a fast-axial-flow CO{sub 2} laser are determined using optical diagnostic methods: the luminescence, interferometry, and degenerate four-wave mixing techniques. The influence of a gas discharge and lasing on turbulent small-scale optical inhomogeneities of the active medium is investigated. It is shown that, in the presence of a gas discharge and laser oscillation, the inhomogeneities appreciably increase due to nonlinear effects of a local heat release in the thermodynamically nonequilibrium turbulent gaseous medium. (special issue devoted to the memory of academician a m prokhorov)
ISSN:1063-7818
DOI:10.1070/QE2003V033N08ABEH002476