Estimation of the Possibility of Information Transfer Using Optical Vortices in the Presence of a Background Formed by an Array of Randomly Located Dislocations

A method allowing one to extract an information signal in a beam whose distortions result in the appearance of additional optical vortices in it is developed. The information is also transmitted with the use of a vortex. The investigation is carried out based on numerical experiments. All dislocations in the corresponding model are introduced into the wavefront in the plane of the source aperture and then the radiation propagates under conditions of free diffraction. The optical scheme of the experiment approximately corresponded to an optical communication line in which radiation undergoes considerable distortions in a thin medium layer located near the exit aperture of the laser generator. In this paper, two methods of extracting an information signal on the background of noises are considered and the possibility of using one of them in real communication lines is demonstrated.