Abstract
Solutions which approximately describe the effect of strong thermal self-action of a laser beam in weakly absorbing media (gases and liquids) have been obtained. This paper considers the regimes of thermal conductivity, transverse flows of gases at subsonic and supersonic velocities, transonic nonlinear regime, and gravitational convection in a horizontal beam. Assuming that the shape of transverse intensity distribution is constant, and that the wave front can be approximated by a second-power polynomial, ordinary differential equations and their solutions for average transverse dimensions of beams have been obtained. These approximate solutions are in satisfactory agreement with exact solutions.
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Zh. Éksp. Teor. Fiz. 116, 105–129 (July 1999)
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Kucherov, A.N. Strong thermal self-action of a laser beam in gases and liquids. J. Exp. Theor. Phys. 89, 56–69 (1999). https://doi.org/10.1134/1.558955
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DOI: https://doi.org/10.1134/1.558955