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Nonlinear interaction of elliptical laser beam with collisional plasma: effect of linear absorption. (English) Zbl 1331.78023

Summary: In the present work, nonlinear interaction of elliptical laser beam with collisional plasma is studied by using paraxial ray approximation. Nonlinear differential equations for the beam width parameters of semi-major axis and semi-minor axis of elliptical laser beam have been set up and solved numerically to study the variation of beam width parameters with normalized distance of propagation. Effects of variation in absorption coefficient and plasma density on the beam width parameters are also analyzed. It is observed from the analysis that extent of self-focusing of beam increases with increase/decrease in plasma density/absorption coefficient.

MSC:

78A60 Lasers, masers, optical bistability, nonlinear optics
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