Self-focusing of cosh-Gaussian laser beam in a plasma with weakly relativistic and ponderomotive regime

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3570663· OSTI ID:21537321

Gill, Tarsem Singh; Mahajan, Ranju; Kaur, Ravinder ^[1]

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1. Department of Physics, Guru Nanak Dev University, Amritsar 143 005 (India)

This paper presents an investigation of the self-focusing of cosh-Gaussian laser beam in a plasma with linear absorption taking into account the combined effects of relativistic and ponderomotive type nonlinearities. Nonlinear parabolic partial differential equation governing the evolution of complex envelope in slowly varying envelope approximation is solved using variational approach. Self-focusing and self-phase modulation as well as self-trapping of cosh-Gaussian beam are studied at various values of decentered parameter b, with different absorption levels k{sub i}{sup '}. Numerical analysis shows that these parameters play vital role on propagation characteristics.

• OSTI ID: 21537321
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
CALCULATION METHODS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
EQUATIONS
FOCUSING
LASER RADIATION
MATHEMATICS
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
RADIATIONS
RELATIVISTIC PLASMA
SORPTION
VARIATIONAL METHODS