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Title: Second harmonic generation by relativistic self-focusing of q-Gaussian laser beam in preformed parabolic plasma channel

This paper presents an investigation of relativistic self-focusing effect of a q-Gaussian laser beam on second harmonic generation in a preformed parabolic plasma channel. An expression has been derived for density perturbation associated with the plasma wave excited by the laser beam. This in turn acts as a source of second harmonic generation. The moment theory approach has been used to derive a differential equation that governs the evolution of spot size of the laser beam with the distance of propagation. The detailed effects of intensity distribution deviation from Gaussian distribution, intensity of laser beam, density, and depth of the channel have been studied on self-focusing as well as on second harmonic generation.
Authors:
;  [1]
  1. Department of Physics, National Institute of Technology Jalandhar, Jalandhar (India)
Publication Date:
OSTI Identifier:
22408014
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DENSITY; DIFFERENTIAL EQUATIONS; DISTURBANCES; FOCUSING; GAUSS FUNCTION; HARMONIC GENERATION; LASER RADIATION; PHOTON BEAMS; PLASMA WAVES; RELATIVISTIC RANGE