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Title: Multifrequency Raman amplifiers

Abstract

In its usual implementation, the Raman amplifier features only one pump carrier frequency. However, pulses with well-separated frequencies can also be Raman amplified while compressed in time. Amplification with frequency-separated pumps is shown to hold even in the highly nonlinear, pump-depletion regime, as derived through a fluid model, and demonstrated via particle-in-cell (PIC) simulations. The resulting efficiency is similar to single-frequency amplifiers, but, due to the beat-wave waveform of both the pump lasers and the amplified seed pulses, these amplifiers feature higher seed intensities with a shorter spike duration. Advantageously, these amplifiers also suffer less noise backscattering, because the total fluence is split between the different spectral components.

Authors:
 [1];  [2]
  1. Hebrew Univ. of Jerusalem (Israel). Racah Inst. of Physics; Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  2. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
Publication Date:
Research Org.:
Princeton Univ., NJ (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1425608
Alternate Identifier(s):
OSTI ID: 1424818
Grant/Contract Number:  
AC02-09CH11466; NA0002948; FA9550-15-1-0391
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 97; Journal Issue: 3; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Laser plasma interaction; Raman amplifiers; nonlinear phenomena in plasmas; stimulated brillouin and raman scattering in plasmas; wave-wave; wave-particle interactions

Citation Formats

Barth, Ido, and Fisch, Nathaniel J. Multifrequency Raman amplifiers. United States: N. p., 2018. Web. doi:10.1103/PhysRevE.97.033201.
Barth, Ido, & Fisch, Nathaniel J. Multifrequency Raman amplifiers. United States. doi:10.1103/PhysRevE.97.033201.
Barth, Ido, and Fisch, Nathaniel J. Thu . "Multifrequency Raman amplifiers". United States. doi:10.1103/PhysRevE.97.033201.
@article{osti_1425608,
title = {Multifrequency Raman amplifiers},
author = {Barth, Ido and Fisch, Nathaniel J.},
abstractNote = {In its usual implementation, the Raman amplifier features only one pump carrier frequency. However, pulses with well-separated frequencies can also be Raman amplified while compressed in time. Amplification with frequency-separated pumps is shown to hold even in the highly nonlinear, pump-depletion regime, as derived through a fluid model, and demonstrated via particle-in-cell (PIC) simulations. The resulting efficiency is similar to single-frequency amplifiers, but, due to the beat-wave waveform of both the pump lasers and the amplified seed pulses, these amplifiers feature higher seed intensities with a shorter spike duration. Advantageously, these amplifiers also suffer less noise backscattering, because the total fluence is split between the different spectral components.},
doi = {10.1103/PhysRevE.97.033201},
journal = {Physical Review E},
number = 3,
volume = 97,
place = {United States},
year = {Thu Mar 08 00:00:00 EST 2018},
month = {Thu Mar 08 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on March 8, 2019
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