Broadband acousto-optic control of the rotation velocity of the radiation polarisation vector

A method is described for the formation of optical radiation with a rotating polarisation vector whose rotation frequency varies over a wide range. The method employs two identical acoustooptic (AO) modulators made of a gyrotropic crystal. The experimentally realised range of the rotation frequency of the polarisation vector of optical radiation with a wavelength of 0.63 × 10^-4 cm with the use of AO TeO₂ cells is found to be ~6 MHz.