Angular distribution of the noise component of light scattered in a stimulated process

An investigation was made of stimulated Brillouin scattering of light in a medium located in a hollow light pipe. The dependence of the angular distribution of the nonreversed component of the scattered radiation on the parameters of the medium and of the exciting light was determined experimentally. The main physical mechanism that determined this angular distribution was found to be the depolarization of the scattered radiation on the walls of the light pipe.