Abstract
Nonlinear optical self action effects of intense laser beams propagating through underdense plasmas have been investigated theoretically. The optical nonlinearity of the plasma has been modelled by ponderomotive force originating through intensity gradient over the cross section of the laser beam. In order to investigate the effect of angular twist of the laser beam, the irradiance over its cross section has been considered to be Laguerre Gaussian (L.G). Formulation is based on finding semi analytical solution for the wave equation for the field of laser beam with the help of moment theory approach.
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Gupta, N. Self focusing and axial phase modulation of laser beams carrying orbital angular momentum in collisionless plasmas. Opt Quant Electron 53, 608 (2021). https://doi.org/10.1007/s11082-021-03274-3
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DOI: https://doi.org/10.1007/s11082-021-03274-3