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Line by‐line imaging of laser‐produced plasmas using one‐dimensional coherent four‐wave mixing
Author(s) -
Akimov D. A.,
Fedotov A. B.,
Koroteev N. I.,
Miles R. B.,
Naumov A. N.,
SidorovBiryukov D. A.,
Zheltikov A. M.
Publication year - 2000
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/1097-4555(200008/09)31:8/9<677::aid-jrs569>3.0.co;2-f
Subject(s) - plasma , atomic physics , four wave mixing , laser , mixing (physics) , excited state , line (geometry) , absorption (acoustics) , phase (matter) , raman spectroscopy , raman scattering , optics , chemistry , physics , nonlinear optics , quantum mechanics , geometry , mathematics
Abstract An experimental technique based on coherent one‐dimensional four‐wave mixing (FWM) with hyper‐Raman resonances was developed for line‐by‐line imaging of the atomic distribution of excited atoms in a low‐temperature plasma of optical breakdown. Comparison of the measured time dependences of FWM intensity and plasma transmission with the results of numerical simulations of plasma expansion allows the assessment of the influence of phase mismatch and one‐photon absorption on FWM in a laser‐produced plasma and demonstrates that FWM images of atomic spatial distributions free of distortions due to phase mismatch and absorption can be obtained for certain stages of plasma expansion. Copyright © 2000 John Wiley & Sons, Ltd.