Observation of laser-pulse shortening in nonlinear plasma waves

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 excit...

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Veröffentlicht in:	Physical review letters 2005-11, Vol.95 (20), p.205003.1-205003.4, Article 205003
Hauptverfasser:	FAURE, J, GLINEC, Y, SANTOS, J. J, EWALD, F, ROUSSEAU, J.-P, KISELEV, S, PUKHOV, A, HOSOKAI, T, MALKA, V
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY Beam trapping, self-focusing and defocusing self-phase modulation ENERGY EFFICIENCY Exact sciences and technology Fundamental areas of phenomenology (including applications) Laser-plasma acceleration of electrons and ions Laser-plasma interactions LASERS LIGHT TRANSMISSION MODULATION Nonlinear optics NONLINEAR PROBLEMS Nonlinear waves and nonlinear wave propagation (including parametric effects, mode coupling, ponderomotive effects, etc.) Optics Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA SIMULATION PLASMA WAVES PONDEROMOTIVE FORCE PULSES RELATIVISTIC PLASMA Ultrafast processes optical pulse generation and pulse compression WAKEFIELD ACCELERATORS Waves, oscillations, and instabilities in plasmas and intense beams
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Zusammenfassung:	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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.95.205003