Diffraction of Annular Light Beams by Ultrasound in Paratellurite Crystals

The Bragg diffraction of two-parameter annular light beams in near and far zones on a slow shear ultrasonic wave in paratellurite crystals was studied. It has been shown that the most efficient transfer of the energy of the annular beam into the first diffraction order takes place for the circular polarization of the incident beam. It has been found that the interacting waves are in the form of circular beams, wherein the characteristics of the diffracted beam are determined by the order parameter and radius of the incident beam, as well as the ultrasonic power and the length of the acoustooptical interaction.