Raman backscattering saturation due to coupling between ωp and 2ωp modes in plasma

G. Raj, B. Ersfeld, G. Vieux, S. Yoffe, Min Sup Hur, R. A. Cairns, D. A. Jaroszynski

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Raman backscattering (RBS) in plasma is the basis of plasma-based amplifiers and is important in laser-driven fusion experiments. We show that saturation can arise from nonlinearities due to coupling between the fundamental and harmonic plasma wave modes for sufficiently intense pump and seed pulses. We present a time-dependent analysis that shows that plasma wave phase shifts reach a maximum close to wavebreaking. The study contributes to a new understanding of RBS saturation for counter-propagating laser pulses.
Original languageEnglish
Article number103026
Number of pages11
JournalNew Journal of Physics
Early online date14 Oct 2015
Publication statusPublished - 14 Oct 2015


  • raman backscattering
  • saturation
  • plasma waves
  • mode coupling

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