Evolution of the polarization of the He–Ne-laser radiation in a rotating insulator

The propagation of the polarized coherent radiation of a He-Ne laser in a rotating insulator is experimentally studied. The reversible transient process of the rotation of the polarization plane and variations in the degree of ellipticity, depolarization, and deflection of the laser beam with a relaxation time of $\tau$ = 10$^2$–10$^3$ s are observed at an insulator rotation frequency of $f$ = 2–250 Hz.