| Autor: |
Gupta, Naveen, Kumar, Sandeep, Gnaneshwaran, A, Kumar, Sanjeev, Choudhry, Suman |
| Zdroj: |
Journal of Optics (09728821); Dec2021, Vol. 50 Issue 4, p701-711, 11p |
| Abstrakt: |
Self-focusing phenomenon of intense laser beams in underdense plasmas has been investigated theoretically. The mechanism of optical nonlinearity of plasma has been modeled by Ohmic heating of the plasma electrons resulting from their collisions with other species. The effect of nonlinear absorption of laser energy in plasma also has been incorporated. Formulation is based on finding a semi-analytical solution of the nonlinear wave equation for the slowly varying beam envelope. For this purpose, moment theory in W. K. B approximation has been invoked that converts nonlinear wave equation to an ordinary differential equation governing the evolution of spot size of the laser beam. The differential equation so obtained has been solved numerically to envision the effect of laser–plasma parameters on self-focusing of the laser beam [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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