Two limiting cases of the acoustooptical interaction of bounded light and ultrasound beams are considered: diffraction of the light beam at a monochromatic acoustic wave and diffraction of a plane light wave at an acoustic wave train. It is shown that, even with the same dimensions of the interaction region, there are significant differences in the structure of the diffracted - light field and in the character of the dependence of the diffraction efficiency of the parameters of the acoustic cell.
Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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