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Title: Amplification of mid-infrared lasers via backscattering in magnetized plasmas

Abstract

We report that plasmas may be used as gain media for amplifying intense lasers, and external magnetic fields may be applied to improve the performance. For midinfrared lasers, the requisite magnetic field is on the megagauss scale, which can already be provided by current technologies. Designing the laser amplifier requires knowing the magnetized three-wave coupling coefficient, which is mapped out systematically in this paper. By numerically evaluating its formula, we demonstrate how the coupling coefficient depends on the angle of wave propagation, laser polarization, magnetic field strength, plasma temperature, and plasma density in the backscattering geometry. In conclusion, since the mediation is now provided by magnetized plasma waves, the coupling can differ significantly from unmagnetized Raman and Brillouin scatterings.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1544946
Alternate Identifier(s):
OSTI ID: 1544599
Report Number(s):
LLNL-JRNL-771568
Journal ID: ISSN 1070-664X; 962929
Grant/Contract Number:  
AC52-07NA27344; NA0003871; 19-ERD-038
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 7; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Shi, Yuan, and Fisch, Nathaniel J. Amplification of mid-infrared lasers via backscattering in magnetized plasmas. United States: N. p., 2019. Web. doi:10.1063/1.5099513.
Shi, Yuan, & Fisch, Nathaniel J. Amplification of mid-infrared lasers via backscattering in magnetized plasmas. United States. doi:10.1063/1.5099513.
Shi, Yuan, and Fisch, Nathaniel J. Wed . "Amplification of mid-infrared lasers via backscattering in magnetized plasmas". United States. doi:10.1063/1.5099513.
@article{osti_1544946,
title = {Amplification of mid-infrared lasers via backscattering in magnetized plasmas},
author = {Shi, Yuan and Fisch, Nathaniel J.},
abstractNote = {We report that plasmas may be used as gain media for amplifying intense lasers, and external magnetic fields may be applied to improve the performance. For midinfrared lasers, the requisite magnetic field is on the megagauss scale, which can already be provided by current technologies. Designing the laser amplifier requires knowing the magnetized three-wave coupling coefficient, which is mapped out systematically in this paper. By numerically evaluating its formula, we demonstrate how the coupling coefficient depends on the angle of wave propagation, laser polarization, magnetic field strength, plasma temperature, and plasma density in the backscattering geometry. In conclusion, since the mediation is now provided by magnetized plasma waves, the coupling can differ significantly from unmagnetized Raman and Brillouin scatterings.},
doi = {10.1063/1.5099513},
journal = {Physics of Plasmas},
number = 7,
volume = 26,
place = {United States},
year = {2019},
month = {7}
}

Journal Article:
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