Zakharov-Benney resonance in optics, acoustics, and optoacoustics
The optical, acoustic, and optoacoustic examples of effective generation of low-frequency signals using high-frequency ones in quadratically nonlinear media, based on the mechanism of Zakharov-Benney resonance, are considered. The collinear and noncollinear regimes are analyzed. It is shown that such a generation is accompanied by a red shift of the high-frequency pulse carrier frequency.