Beyond nonlinear saturation of backward Raman amplifiers

Barth, Ido; Toroker, Zeev; Balakin, Alexey A.; Fisch, Nathaniel J.

doi:10.1103/PhysRevE.93.063210

Title: Beyond nonlinear saturation of backward Raman amplifiers

Journal Article · 26 June 2016 · Physical Review E

DOI: https://doi.org/10.1103/PhysRevE.93.063210 · OSTI ID:1305352

^[1]; Toroker, Zeev ^[2]; Balakin, Alexey A. ^[3];

^[4]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Technion Israel Inst. of Technology, Haifa (Israel)
Inst. of Applied Physics RAS, Nizhnii Novgorod (Russia)
Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences

Backward Raman amplification is limited by relativistic nonlinear dephasing resulting in saturation of the leading spike of the amplified pulse. We employed pump detuning in order to mitigate the relativistic phase mismatch and to overcome the associated saturation. In an amplified pulse can then be reshaped into a monospike pulse with little precursory power ahead of it, with the maximum intensity increasing by a factor of two. Finally, this detuning can be employed advantageously both in regimes where the group velocity dispersion is unimportant and where the dispersion is important but small.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC02-09CH11466; NA0002948

OSTI ID:: 1305352

Journal Information:: Physical Review E, Journal Name: Physical Review E Journal Issue: 6 Vol. 93; ISSN PLEEE8; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Laser-plasma interactions in magnetized environment Shi, Yuan; Qin, Hong; Fisch, Nathaniel J. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5017980	journal	May 2018
Influence of nonlinear detuning at plasma wavebreaking threshold on backward Raman compression of non-relativistic laser pulses Balakin, A. A.; Fraiman, G. M.; Jia, Q. Physics of Plasmas, Vol. 25, Issue 6 https://doi.org/10.1063/1.5028567	journal	June 2018
Raman compression of laser pulses in wedge-shaped jet plasma Balakin, A. A.; Skobelev, S. A.; Fraiman, G. M. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5085869	journal	April 2019
Transition between inverse and direct energy cascades in multiscale optical turbulence Malkin, V. M.; Fisch, N. J. Physical Review E, Vol. 97, Issue 3 https://doi.org/10.1103/physreve.97.032202	journal	March 2018
Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media Malkin, V. M.; Fisch, N. J. Physical Review Letters, Vol. 117, Issue 13 https://doi.org/10.1103/physrevlett.117.133901	journal	September 2016

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Title: Beyond nonlinear saturation of backward Raman amplifiers

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