J. Phys. IV France
Volume 133, June 2006
Page(s) 351 - 353
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 351-353

DOI: 10.1051/jp4:2006133071

Plasma density fluctuations driven by a randomized laser beam and application to self-smoothing

M. 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.

© EDP Sciences 2006