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Analysis of temperature range for self-focusing of lowest-order Bessel–Gaussian laser beams in plasma

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Abstract

In this work, temperature range for self-focusing of lowest-order Bessel–Gaussian laser beams in plasma having relativistic–ponderomotive regime of interaction has been investigated. The nonlinear differential equation for beam-width parameter is obtained by using Wentzel–Kramers–Brillouin (WKB) and paraxial approximations through parabolic equation approach and solved it numerically. In case of Gaussian beam, it is pointed out that there is a temperature range in which self-focusing can occur, while the beam defocuses outside this region. The significant contribution of transverse component of wave parameter of the beam on temperature range of self-focusing has been especially examined. The temperature range for self-focusing of Gaussian beam in the considered regime of interaction with plasma is also deduced as a particular case in the present work.

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Authors and Affiliations

  1. Department of Physics, Devchand College, Arjunnagar, Maharashtra, 591 237, India

    S. D. Patil

  2. Department of Physics, Sanjay Ghodawat University, Atigre, Maharashtra, 416 118, India

    B. D. Vhanmore

  3. Department of Physics, Shivaji University, Kolhapur, Maharashtra, 416 004, India

    M. V. Takale

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  1. S. D. Patil
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  3. M. V. Takale
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Patil, S.D., Vhanmore, B.D. & Takale, M.V. Analysis of temperature range for self-focusing of lowest-order Bessel–Gaussian laser beams in plasma. J Opt 49, 510–515 (2020). https://doi.org/10.1007/s12596-020-00655-x

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