Abstract
Resonant two-photon scattering by acoustic vibrations of atoms or molecules in a gas is studied. It is shown that an acoustic field of frequency ωa acting on laser radiation spectra not only gives rise to the usual spectral structures induced by a parametric resonance, but also to satellite lines at the combination frequencies = ω + ωa (ω and are the frequencies of laser fields). Possible applications of such parametric laser—acoustic resonances include the diagnostics of gaseous media and of acoustic fields.
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