Chirped pulse Raman amplification in warm plasma: towards controlling saturation

X. Yang, G. Vieux, E. Brunetti, B. Ersfeld, J. P. Farmer, M. S. Hur, R. C. Issac, G. Raj, S. M. Wiggins, G. H. Welsh, S. R. Yoffe, D. A. Jaroszynski

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Stimulated Raman backscattering in plasma is potentially an efficient method of amplifying laser pulses to reach exawatt powers because plasma is fully broken down and withstands extremely high electric fields. Plasma also has unique nonlinear optical properties that allow simultaneous compression of optical pulses to ultra-short durations. However, current measured efficiencies are limited to several percent. Here we investigate Raman amplification of short duration seed pulses with different chirp rates using a chirped pump pulse in a preformed plasma waveguide. We identify electron trapping and wavebreaking as the main saturation mechanisms, which lead to spectral broadening and gain saturation when the seed reaches several millijoules for durations of 10’s – 100’s fs for 250 ps, 800 nm chirped pump pulses. We show that this prevents access to the nonlinear regime and limits the efficiency, and interpret the experimental results using slowly-varying-amplitude, current-averaged particle-in-cell simulations. We also propose methods for achieving higher efficiencies.
LanguageEnglish
Article number13333
Number of pages9
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 20 Aug 2015

Fingerprint

saturation
pulses
seeds
pumps
chirp
backscattering
trapping
waveguides
optical properties
electric fields
cells
lasers
electrons
simulation

Keywords

  • Raman amplification
  • plasma channel
  • laser-plasma interactions

Cite this

@article{aa2174f054074bd6aff8afc4d93ba47b,
title = "Chirped pulse Raman amplification in warm plasma: towards controlling saturation",
abstract = "Stimulated Raman backscattering in plasma is potentially an efficient method of amplifying laser pulses to reach exawatt powers because plasma is fully broken down and withstands extremely high electric fields. Plasma also has unique nonlinear optical properties that allow simultaneous compression of optical pulses to ultra-short durations. However, current measured efficiencies are limited to several percent. Here we investigate Raman amplification of short duration seed pulses with different chirp rates using a chirped pump pulse in a preformed plasma waveguide. We identify electron trapping and wavebreaking as the main saturation mechanisms, which lead to spectral broadening and gain saturation when the seed reaches several millijoules for durations of 10’s – 100’s fs for 250 ps, 800 nm chirped pump pulses. We show that this prevents access to the nonlinear regime and limits the efficiency, and interpret the experimental results using slowly-varying-amplitude, current-averaged particle-in-cell simulations. We also propose methods for achieving higher efficiencies.",
keywords = "Raman amplification, plasma channel, laser-plasma interactions",
author = "X. Yang and G. Vieux and E. Brunetti and B. Ersfeld and Farmer, {J. P.} and Hur, {M. S.} and Issac, {R. C.} and G. Raj and Wiggins, {S. M.} and Welsh, {G. H.} and Yoffe, {S. R.} and Jaroszynski, {D. A.}",
year = "2015",
month = "8",
day = "20",
doi = "10.1038/srep13333",
language = "English",
volume = "5",
journal = "Scientific Reports",
issn = "2045-2322",

}

Chirped pulse Raman amplification in warm plasma : towards controlling saturation. / Yang, X.; Vieux, G.; Brunetti, E.; Ersfeld, B.; Farmer, J. P.; Hur, M. S.; Issac, R. C.; Raj, G.; Wiggins, S. M.; Welsh, G. H.; Yoffe, S. R.; Jaroszynski, D. A.

In: Scientific Reports, Vol. 5, 13333, 20.08.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Chirped pulse Raman amplification in warm plasma

T2 - Scientific Reports

AU - Yang, X.

AU - Vieux, G.

AU - Brunetti, E.

AU - Ersfeld, B.

AU - Farmer, J. P.

AU - Hur, M. S.

AU - Issac, R. C.

AU - Raj, G.

AU - Wiggins, S. M.

AU - Welsh, G. H.

AU - Yoffe, S. R.

AU - Jaroszynski, D. A.

PY - 2015/8/20

Y1 - 2015/8/20

N2 - Stimulated Raman backscattering in plasma is potentially an efficient method of amplifying laser pulses to reach exawatt powers because plasma is fully broken down and withstands extremely high electric fields. Plasma also has unique nonlinear optical properties that allow simultaneous compression of optical pulses to ultra-short durations. However, current measured efficiencies are limited to several percent. Here we investigate Raman amplification of short duration seed pulses with different chirp rates using a chirped pump pulse in a preformed plasma waveguide. We identify electron trapping and wavebreaking as the main saturation mechanisms, which lead to spectral broadening and gain saturation when the seed reaches several millijoules for durations of 10’s – 100’s fs for 250 ps, 800 nm chirped pump pulses. We show that this prevents access to the nonlinear regime and limits the efficiency, and interpret the experimental results using slowly-varying-amplitude, current-averaged particle-in-cell simulations. We also propose methods for achieving higher efficiencies.

AB - Stimulated Raman backscattering in plasma is potentially an efficient method of amplifying laser pulses to reach exawatt powers because plasma is fully broken down and withstands extremely high electric fields. Plasma also has unique nonlinear optical properties that allow simultaneous compression of optical pulses to ultra-short durations. However, current measured efficiencies are limited to several percent. Here we investigate Raman amplification of short duration seed pulses with different chirp rates using a chirped pump pulse in a preformed plasma waveguide. We identify electron trapping and wavebreaking as the main saturation mechanisms, which lead to spectral broadening and gain saturation when the seed reaches several millijoules for durations of 10’s – 100’s fs for 250 ps, 800 nm chirped pump pulses. We show that this prevents access to the nonlinear regime and limits the efficiency, and interpret the experimental results using slowly-varying-amplitude, current-averaged particle-in-cell simulations. We also propose methods for achieving higher efficiencies.

KW - Raman amplification

KW - plasma channel

KW - laser-plasma interactions

U2 - 10.1038/srep13333

DO - 10.1038/srep13333

M3 - Article

VL - 5

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 13333

ER -