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Laser pulse compression and amplification via Raman backscattering in plasma

Published online by Cambridge University Press:  08 December 2009

Ashutosh Sharma  and
Ioannis Kourakis
Ashutosh Sharma*
Affiliation:
Centre for Plasma Physics, School of Mathematics and Physics, Queen's University, Belfast, Northern Ireland, United Kingdom
Ioannis Kourakis
Affiliation:
Centre for Plasma Physics, School of Mathematics and Physics, Queen's University, Belfast, Northern Ireland, United Kingdom
*
Address correspondence and reprint requests to: Ashutosh Sharma, Centre for Plasma Physics, School of Mathematics and Physics, Queen's University, Belfast, Northern Ireland, United Kingdom. E-mail: a.sharma@qub.ac.uk or a_physics2001@yahoo.com
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Abstract

A simple theoretical model is proposed for the interaction between two counter-propagating laser pulses (a pump and a seed pulse) in unmagnetized plasma. Pulse compression and amplification are observed via numerical simulation. A one dimensional fluid model for stimulated Raman backscattering is proposed to investigate the pulse compression and pulse amplification mechanisms. To accomplish this, energy is transferred from the long pump pulse to a seed pulse, with a Langmuir plasma wave mediating the transfer. The study focuses on the intensity profile of the pump laser pulse. A Gaussian and a ring intensity profile are, separately, considered for the pump laser pulse.

Keywords

CompressionPulse amplificationRaman backscattering
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 4 , December 2009 , pp. 579 - 585
Copyright
Copyright © Cambridge University Press 2009

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