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Observation of Laser-Pulse Shortening in Nonlinear Plasma Waves

Abstract : We have measured the temporal shortening of an ultraintense laser pulse interacting with an underdense plasma. When interacting with strongly nonlinear plasma waves, the laser pulse is shortened from 38±2  fs to the 10–14 fs level, with a 20% energy efficiency. The laser ponderomotive force excites a wakefield, which, along with relativistic self-phase modulation, broadens the laser spectrum and subsequently compresses the pulse. This mechanism is confirmed by 3D particle in cell simulations.
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Submitted on : Monday, August 2, 2010 - 12:34:53 PM
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Jérôme Faure, Yannick Glinec, J.J. Santos, F. Ewald, Jean-Philippe Rousseau, et al.. Observation of Laser-Pulse Shortening in Nonlinear Plasma Waves. Physical Review Letters, American Physical Society, 2005, 95 (20), pp.205003. ⟨10.1103/PhysRevLett.95.205003⟩. ⟨hal-00507934⟩



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