Polarization Extinction Ratio Measurement in Optical Communication Systems
光纤通信中偏振光消光比测量方法的研究

Two methods for measuring the Polarization Extinction Ratio (PER) of polarized light in optical communication systems-Rotating Polarizer Method (RPM) and Poincare Sphere Method (PSM) are compared with each other.The RPM method directly measures the polarization extinction ratio by using a high-speed rotating polarizer to detect the required light power and the PSM method indirectly calculates the polarization extinction ratio according to the Stokes parameters of the polarized light.The former method is intuitionistic and easy to operate,but is not stable and has dependence on the wavelength.The latter method is relatively abstracted and complicated,but is more stable,