Study on High-order Polarization Mode Dispersion and its Compensation Method in High-speed Optical Communication Systems

With the development of high-speed, longdistance optical fiber communication systems, single-mode fiber polarization mode dispersion (PMD: Polarization mode dispersion) becomes one of the important factor limiting high-speed, long-distance optical fiber transmission. Polarization mode dispersion can cause pulse broadening in thedigital transmission system, result inter-symbol interference in digital communications, has seriously affected the quality of signal transmission. Because PMD has statistical properties under external influences during transmission, polarization mode dispersion compensation technology is much more complex than chromatic dispersion compensation techniques. This paper mainly discusses PMD and high-order PMD compensation method, simulate the first order PMD statistical properties, second order PMD statistical properties, and the broaden factor under un-compensation, the first-order compensation, the second-order compensation and the third-order compensation. the simulations have obtained that the compensation method based on center frequency Taylor series expansion does not apply to large PMD pulse-width ratio, but the high-order PMD compensation method based on the average frequency can reduce the broadening factor.