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Updated: Aug 14, 2026

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Experimental evidence of plasma-induced incoherence of an intense laser beam propagating in an underdense plasma
J Fuchs1, C Labaune, S Depierreux
1Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605, CNRS-Ecole Polytechnique-CEA-Université Paris VI, Palaiseau, France.
Abstract:
Time dependent large angular spreading and spectral broadening of an intense randomized laser beam propagating in an underdense, well-characterized plasma is measured. The two features are correlated and increase with laser intensity or plasma density. This spatial and temporal incoherence imposed upon the beam via the coupling with the plasma is interpreted, in agreement with recent numerical simulations, as due to the interplay between dynamical filamentation and strongly driven stimulated Brillouin forward scattering.
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