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Domains of modulation parameter in the interaction of finite Airy–Gaussian laser beams with plasma

Published online by Cambridge University Press:  15 September 2020

V. S. Pawar ,
S. R. Kokare ,
S. D. Patil Open the ORCID record for S. D. Patil [Opens in a new window]  and
M. V. Takale
V. S. Pawar
Affiliation:
Department of Physics, DKASC College, Ichalkaranji, Maharashtra416 115, India
S. R. Kokare
Affiliation:
Department of Physics, Raje Ramrao Mahavidyalaya, Jath, Maharashtra416 404, India
S. D. Patil*
Affiliation:
Department of Physics, Devchand College, Arjunnagar, Maharashtra591 237, India
M. V. Takale
Affiliation:
Department of Physics, Shivaji University, Kolhapur, Maharashtra416 004, India
*
Author for correspondence: S. D. Patil, Department of Physics, Devchand College, Arjunnagar591 237, Maharashtra, India. E-mail: sdpatil_phy@rediffmail.com
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Abstract

In this paper, self-focusing of finite Airy–Gaussian (AiG) laser beams in collisionless plasma has been investigated. The source of nonlinearity considered herein is relativistic. Based on the Wentzel–Kramers–Brillouin (WKB) and paraxial-ray approximations, the nonlinear coupled differential equations for beam-width parameters in transverse dimensions of AiG beams have been established. The effect of beam's modulation parameter and linear absorption coefficient on the self-focusing/defocusing of the beams is specifically considered. It is found that self-focusing/defocusing of finite AiG beams depends on the range of modulation parameter. The extent of self-focusing is found to decrease with increase in absorption.

Keywords

Absorptionfinite Airy–Gaussian beamsplasmarelativisticself-focusing
Type
Research Article
Information
Laser and Particle Beams , Volume 38 , Issue 3 , September 2020 , pp. 204 - 210
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Copyright
Copyright © The Author(s) 2020. Published by Cambridge University Press

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