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Proceedings Paper

Advanced model for SBS of a randomized laser beam and application to polarization smoothing experiments with preformed underdense plasmas
Author(s): V. T. Tikhonchuk; Julien Fuchs; C. Labaune; S. Depierreux; Hector A. Baldis; S. Hueller; J. Myatt; Denis Pesme
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Paper Abstract

A model is presented, which describes the stimulated Brillouin scattering (SBS) of a randomized laser beam interacting with an underdense, expanding plasma. The model accounts for the self-focusing of speckles in the regime where plasma heating has an important effect on speckle self-focusing and on SBS threshold and reflectivity. The model exhibits a good agreement with SBS levels measured at the LULI multi-beam facility for a broad range of the laser and plasma parameters and both types of beam smoothing - RPP and polarization smoothing (PS). The model and experiments confirm that eh PS technique allows to control the SBS level more efficiently than RPP.

Paper Details

Date Published: 23 April 2001
PDF: 4 pages
Proc. SPIE 4424, ECLIM 2000: 26th European Conference on Laser Interaction with Matter, (23 April 2001); doi: 10.1117/12.425641
Show Author Affiliations
V. T. Tikhonchuk, Ecole Polytechnique and P.N. Lebedev Physical Institute (Russia)
Julien Fuchs, Ecole Polytechnique (France)
C. Labaune, Ecole Polytechnique (France)
S. Depierreux, Ecole Polytechnique (France)
Hector A. Baldis, Lawrence Livermore National Lab. (United States)
S. Hueller, Ecole Polytechnique (France)
J. Myatt, Ecole Polytechnique (France)
Denis Pesme, Ecole Polytechnique (France)

Published in SPIE Proceedings Vol. 4424:
ECLIM 2000: 26th European Conference on Laser Interaction with Matter
Milan Kalal; Karel Rohlena; Milan Sinor, Editor(s)

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