Automatic Optical Fiber Polarization Control System Using Multilayer Piezoelectric Actuators : V: Piezoelectrics

An automatic optical fiber polarization control system has been developed. The system consists of two identical polarization control devices using tiny multilayer piezoelectric actuators, which compress the single mode fiber from both sides. The polarization control devices have low insertion loss of less than 0.1 dB, high extinction ratio of about 18 dB and low half-wave voltage of about 30 V.