J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 351-353
Plasma density fluctuations driven by a randomized laser beam and application to self-smoothingM. Grech1, V.T. Tikhonchuk1, S. Weber1 and G. Riazuelo2
1 CELIA, Université Bordeaux 1, 33405 Talence, France
2 CEA/DIF/DPTA, 92680 Bruyères-le-Châtel, France
The multiple scattering of random laser beams on self-induced density fluctuations is responsible for the modification of the spatial and temporal coherence properties of the transmitted light. We investigate within a statistical approach the excitation of density fluctuations by randomized laser beams. Their spectrum is derived and their level is estimated as a few percents. The thermal effects are discussed. We characterize the evolution of the density perturbation level in time and along the propagation axis.
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