Study On Polarizaiton Mode Dispersion Compensation In High-speed Optical Fiber Communication System By Phase-sensitive Amplifier

Optical fiber communication's goal is high speed transmission, large capacity and long transmission. Fiber loss and dispersion are obstacles to achieve this goal. Erbium-doped fiber amplifier (EDFA) can solve fiber loss issue, but it does not have the function of dispersion compensation. Because of strong phase sensitivity of its optical gain, phase-sensitive amplifier (PSA) not only provides gain to the main quadrature of signal pulse, but also acts as filter to its orthogonal quadrature, thus prevents pulse from getting broader. With the continuous improvement of system transmission rate, polarization mode dispersion (PMD) severely restricts the development of high-speed optical fiber communication system.This paper solves the Nonlinear Schrodinger (NLS) equations by Fourier method and simulates the effect of using EDFA and PSA as in-line amplifier to compensate PMD in high-speed optical fiber communication system. First, this paper introduces PMD's impact to optical fiber communication system. And then from the theoretical point of view, this paper analyzes characteristics between EDFA and PSA. And then, the simulation modle is established. Finally, considering to fiber group velocity dispersion (GVD), PMD, fiber loss, and fiber nonlinear effect, this paper compares PMD compensation effect between EDFA and PSA from various angles. The result shows that EDFA performance is near to PSA performance in low-speed communication system, but PSA performance as in-line amplifer is better than EDFA in high-speed optical fiber communication system. And when change simulation parameters, EDFA and PSA performance will be different. The rational system parameters can help improve system performance. Under the same system parameters, PSA performance is better than EDFA.In short, PSA can compensate PMD in a certain range to improve system performance. By the research of PSA in high-speed optical fiber communication system, this paper has a certain reference value for the PSA practical application.