Control and ultra-short pulse generation in stimulated Raman backscattering
AuthorsŠkorić, Miloš M.
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A stimulated Raman scattering (SRS) is a great concern for laser fusion, causing an energy and symmetry loss and target preheating. In particular, for dominating backward SRS (BRS), a complexity of nonlinear saturation was revealed. Recently, to develop lasers at multi-exawatts and beyond, relevant to high-energy physics, a proposed Raman amplification based on BRS met a restrictive operation window. Here, we stress BRS generics that due to a nonlinear frequency shift (relativistic/trapping effect), it nonlinearly saturates with intermittent pulsations. A break up of Manley-Rowe invariants explains a non-steady saturation. Further, a coherent pulsation BRS regime is proposed for femto-sec pulse generation in a thin exploding foil plasma, with parameter scalings investigated by analytics and particle simulations.
Source:Journal of Physics: Conference Series, 2016, 688
- 8th International Conference on Inertial Fusion Sciences and Applications (IFSA), Sep 08-13, 2013, Nara, Japan