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Stimulated Raman backscattering of filamented hollow Gaussian beams

Published online by Cambridge University Press:  10 June 2013

Ram Kishor Singh  and
R.P. Sharma
Ram Kishor Singh*
Affiliation:
Centre for Energy Studies, Delhi, India
R.P. Sharma
Affiliation:
Centre for Energy Studies, Delhi, India
*
Address correspondence and reprint requests to: Ram Kishor Singh, Centre for Energy Studies, IIT Delhi, India110016. E-mail: ram007kishor@gmail.com
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Abstract

This paper presents a model for excitation of electron plasma wave and resulting stimulated Raman scattering due to presence of a laser beam carrying null intensity in center (hollow Gaussian beam) in a collisionless plasma. We have studied the self-focusing of the hollow Gaussian beam and its effect on back stimulated Raman scattering process in the presence of ponderomotive nonlinearity. To understand the nature of propagation of the hollow Gaussian beam, electron plasma wave and back reflectivity, a paraxial-ray approximation has been invoked. It is predicted that self-focusing and back reflectivity reduces for higher order of hollow Gaussian beam.

Keywords

Electron plasma waveHollow Gaussian Laser beamPonderomotive nonlinearitySelf-focusingStimulated Raman scattering
Type
Research Article
Information
Laser and Particle Beams , Volume 31 , Issue 3 , September 2013 , pp. 387 - 394
Copyright
Copyright © Cambridge University Press 2013 

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References

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