Interferometric optical fiber sensors have drawn much attention for its high sensitivity in sensor technology, and have been applied in many fields. While, polarization fading of optical signal induced by enviromental fluctuation is still a problem. Though Polarization maintaining optical fiber(PMF) can be used to overcome the fading, it is still costly. So it is significant to study the polarization problem in single mode optical fiber(SMF) and realize dynamic compensation technology for polarization fadin...