Bagachuk D. Polarization mode dispersion compensation based on a single-mode optical fiber with anisotropic properties

The object - polarization mode dispersion (PMD) compensation based on a single-mode optical fiber (OF) with anisotropic properties. The subject - polarization mode dispersion in a single-mode optical fiber with anisotropic properties. Research methods - for the tasks solution in the work are used:methods of the transmission lines theory for PMD research in optical fibers; methods of optical communication physics for researches transmission parameters of optical fibers; crystal optics methods for the study of anisotropic properties of OF; elements of the theory of elasticity for the study of the influence of mechanical deformation on transmission parameters of optical fibers; methods of the differential calculus to determine the connection between the geometric parameters of the spiral bending and the value of PMD in optical fibers. Theoretical and practical results: a method for polarization mode dispersion compensation was developed, which is based on the use of artificially created difference of phase velocities of propagation of the main ordinary and extraordinary waves, in a helically bent optical fiber (HBOF) by changing the geometric parameters of the bend; the compensator of polarization mode dispersion is developed, which is based on the HBOF; also it was created a mathematical model for PMD calculation in such compensators depending on their parameters and taking into account the tension force of an optical fiber; it was improved the mathematical model of the attenuation calculation which is induced by the PMD compensator based on a helical bent optical fiber; a method for polarization mode dispersion compensation through the use of acousto-optical modulation of the refractive index of the HBOF core was developed; the adaptive compensator of polarization mode dispersion based on a helically bent optical fiber subjected to acoustic effects is developed; a comparison of the results of obtained in PMD compensator, which is based on a helically bent optical fiber, with the experimental results, confirmed the efficiency of the compensator.