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Demonstration of detuning and wavebreaking effects on Raman amplification efficiency in plasma

Phys. Plasmas 15, 113104 (2008); doi:10.1063/1.3023153

Published 20 November 2008

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N. A. Yampolsky,1 N. J. Fisch,1 V. M. Malkin,1 E. J. Valeo,2 R. Lindberg,3 J. Wurtele,3 J. Ren,4 S. Li,4 A. Morozov,4 and S. Suckewer4
1Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544, USA
2Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543, USA
3Department of Physics, University of California, Berkeley, Berkeley, California 94720, USA
4Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08543, USA
A plasma-based resonant backward Raman amplifier/compressor for high power amplification of short laser pulses might, under ideal conditions, convert as much as 90% of the pump energy to the seed pulse. While the theoretical highest possible efficiency of this scheme has not yet been achieved, larger efficiencies than ever before obtained experimentally (6.4%) are now being reported, and these efficiencies are accompanied by strong pulse compression. Based on these recent extensive experiments, it is now possible to deduce that the experimentally realized efficiency of the amplifier is likely constrained by two factors, namely the pump chirp and the plasma wavebreaking, and that these experimental observations may likely involve favorable compensation between the chirp of the laser and the density variation of the mediating plasma. Several methods for further improvement of the amplifier efficiency in current experiments are suggested. ©2008 American Institute of Physics
History: Received 30 June 2008; accepted 20 October 2008; published 20 November 2008
Permalink: http://link.aip.org/link/?PHPAEN/15/113104/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.38.Bv
    Rayleigh scattering; stimulated Brillouin and Raman scattering in plasmas
  • 42.65.Dr
    Stimulated Raman scattering; CARS
  • 42.65.Re
    Ultrafast processes; optical pulse generation and pulse compression
  • 52.25.Os
    Emission, absorption, and scattering of electromagnetic radiation from plasmas
  • YEAR: 2008

PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
Publisher:
AIP is a member of CrossRef AIP

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