Relativistic channel-coupling focusing enhanced nonlinear guiding of an intense laser beam in a plasma channel

We employ the variational method to study the optical guiding of an intense laser beam in a preformed plasma channel without using the weakly relativistic approximation. Apart from the dependence on the laser power and the nonlinear channel strength parameter, the beam focusing properties is shown a...

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Bibliographic Details
Published in:Physics letters. A 2009-01, Vol.373 (3), p.363-366
Main Authors: Liu, Mingwei, Li, Ruxin, Xu, Zhizhan, Kim, Cheol-Jung
Format: Article
Language:English
Subjects:
Laser-plasma interaction
Optical guiding
Relativistic effects
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Summary:We employ the variational method to study the optical guiding of an intense laser beam in a preformed plasma channel without using the weakly relativistic approximation. Apart from the dependence on the laser power and the nonlinear channel strength parameter, the beam focusing properties is shown also to be governed by the laser intensity. Relativistic channel-coupling focusing, arising from the coupling between relativistic self-focusing and linear channel focusing, can enhance relativistic self-focusing but its strength is weaker than that of linear channel focusing.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2008.11.027