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Relativistic self-focusing and self-phase modulation of cosh-Gaussian laser beam in magnetoplasma

Published online by Cambridge University Press:  22 March 2011

Tarsem Singh Gill*
Department of Physics, Guru Nanak Dev University, Amritsar, India
Ravinder Kaur
Department of Physics, Guru Nanak Dev University, Amritsar, India
Ranju Mahajan
Department of Physics, Guru Nanak Dev University, Amritsar, India
Address correspondence and reprint requests to: Tarsem Singh Gill, Department of Physics, Guru Nanak Dev University, Amristar 143005, India. E-mail:


In this paper, we have investigated the propagation characteristics of cosh-Gaussian laser beam in magnetoplasma using relativistic nonlinearity. The field distribution in the medium is expressed in terms of beam width parameter an and decentred parameter b. An appropriate nonlinear Schräodinger equation has been solved analytically using variational approach. The behaviour of beam width parameter with dimensionless distance of propagation ξ for various b values is examined. Self-phase modulation and self-trapping is also studied under variety of parameters. Further, the effect of magnetic field on self-focusing of the beam have been explored.

Research Article
Copyright © Cambridge University Press 2011

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