RESONANT ACOUSTOOPTIC EFFECTS IN A GAS

Resonant two-photon scattering by acoustic vibrations of atoms or mole cules in a gas is studied. It is shown that an acoustic field of frequ ency omega(a) 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 omega(mu) = ome ga + omega(a) (omega and omega(mu) are the frequencies of laser fields ). Possible applications of such parametric laser-acoustic resonances include the diagnos-tics of gaseous media and of acoustic fields.