The Utilization of Two-Mode Optical Fiber in Free Space Optics Communication

In our contribution we propose using of a two-mode optical fiber as a primary source in a transmitting optical head instead of the laser diode. In the article we are interested in the distribution of the optical intensity and the complex degree of coherence in the output aperture of the lens. This aperture is irradiated by a step-index weakly guiding optical fiber. In our treatment we take into account weakly guided modes with polarization corrections to the propagation constant and unified theory of the second order coherence and polarization of electromagnetic beams.