Nonreciprocal optical effects in anisotropic diffraction by a travelling ultrasonic wave

A theoretical investigation is made of the characteristic features of acousto-optical nonreciprocal effects in anisotropic Bragg diffraction by travelling ultrasonic waves. It is shown that wide-aperture nonreciprocal acousto-optical devices can be constructed from wide-aperture acousto-optical modulators. The conditions are established for complete elimination of the amplitude and phase nonreciprocities of acousto-optical devices in the case of double anisotropic diffraction of counterpropagating optical waves.