The variation of light polarization in the process of Bragg's acoustooptic interaction has been investigated theoretically. It is shown that in the propagation of linearly polarized light through an acoustic field excited in an isotropic medium the light radiation becomes elliptically polarized. By varying the ultrasound intensity or frequency it is possible to control the polarization state. The effect of polarization nonreciprocity has also been studied for two light waves propagating through an acoustic field in the opposite directions.
Department of Physics of Oscillations, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia