Coherent scattering of CO2light from ion‐acoustic waves
作者:
A. L. Peratt,
R. L. Watterson,
H. Derfler,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1977)
卷期:
Volume 20,
issue 11
页码: 1900-1910
ISSN:0031-9171
年代: 1977
DOI:10.1063/1.861809
出版商: AIP
数据来源: AIP
摘要:
Scattering of laser radiation from ion‐acoustic waves in a plasma is investigated analytically and experimentally. The formulation predicts a coherent component of the scattered power on a largely incoherent background spectrum when the acoustic analog of Bragg’s law and Doppler shift conditions are satisfied. The experiment consists of a hybrid CO2laser system capable of either low power continuous wave or high power pulsed mode operation. A heterodyne light mixing scheme is used to detect the scattered power. The proportionality predicted by the theory is verified by scattering from externally excited acoustic and ion‐acoustic waves; continuous wave and pulsed modes in each case. Measurement of the ion‐acoustic dispersion relation by continuous wave scattering is also presented.
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