Fine structure of optical vortices in a crystal: A monochromatic singular beam

The fine structure of optical vortices in a perturbed singular beam past the uniaxial crystal-polarization filter system is considered. The method of determination of the relative weight of the partial vortices contained in the perturbed vortex is discussed. The dependence of the relative weight of the partial vortices on the displacement of the perturbed vortex from the beam axis is presented.