Plasma density measurements using chirped pulse broad-band Raman amplification

Gregory Vieux, Bernhard Ersfeld, John Patrick Farmer, Min Sup Hur, Riju Issac, Dino Jaroszynski

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Abstract

Stimulated Raman backscattering is used as a non-destructive method to determine the density of plasma media at localized positions in space and time. By colliding two counter-propagating, ultra-short laser pulses with a spectral bandwidth larger than twice the plasma frequency, amplification occurs at the Stokes wavelengths, which results in regions of gain and loss separated by twice the plasma frequency, from which the plasma density can be deduced. By varying the relative delay between the laser pulses, and therefore the position and timing of the interaction, the spatio-temporal distribution of the plasma density can be mapped out.
Original languageEnglish
Article number121106
Number of pages4
JournalApplied Physics Letters
Volume103
Issue number12
Early online date18 Sep 2013
DOIs
Publication statusPublished - 18 Sep 2013

Keywords

  • Raman amplification
  • plasma channel
  • plasma density measurement

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