Abstract
A Bragg diffraction variant consisting in the diffraction of three-color radiation with wavelengths of 488, 514, and 633 nm by an acoustic wave propagating in a paratellurite crystal is investigated. The radiation with a wavelength of 633 nm is in strict Bragg synchronism with the acoustic wave, while other beams are diffracted with slight violations of the synchronism condition. The diffraction efficiency in the first diffraction order is experimentally determined to be no less than 70% for all the aforementioned wavelengths of optical radiation.
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