Diffraction of two-parameter ring light beams by ultrasound in paratellurite crystals

Bragg diffraction of two-parameter ring light beams on a slow shear ultrasonic wave in paratellurite crystals was investigated. It has been shown that the energy of the ring beam is efficiently pumped from the zero to the first diffraction order, and the more efficient energy exchange of the diffracted light beams is realized for circular polarized light waves. It has been found that the interacting waves have the shape of circular beams, wherein the parameters of the diffracted beam are determined by the order parameter and the radius of the incident beam, as well as the power of ultrasound, the length of acoustooptical interaction and the Bragg angle.