Measurement of second-order polarization mode dispersion in single mode fiber with Poincare sphere method

We measured the second-order polarization mode dispersion (SOPMD) in a 75 km single mode fiber with the Poincare sphere method. The parallel component and perpendicular component (also called the depolarization component) of SOPMD were analyzed, and the statistical properties of them were also analyzed. According to these we found that the perpendicular component has a greater impact on pulse than that of the parallel component in mean.