Acta Optica Sinica, Volume. 29, Issue 1, 219(2009)
Optical Voltage Transducer Based on Modular Interference in Highly Elliptical-Core Polarization-Maintaining Fiber
An optical voltage transducer (OVT) for the electric power system based on modular interference in dual-mode highly elliptical-core polarization maintenance fiber (E-core PMF) is designed, and the temperature and environmental perturbation can be compensated automatically. A quartz crystal cylinder wrapped with highly elliptical-core fiber plays the role of voltage sensor head. The two interference output lobes′ intensity from the E-core PMF is modulated with the converse piezoelectric effect of quartz crystal. A PZT wrapped with E-core PMF at ground potential serves as the static modular phase difference control and temperature compensation unit. The experimental results show that the measurement precision of is 0.5% near by rated voltage, and the OVT has a good linearity when measured voltage is greater than 10 kV.
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Liu Feng, Bi Weihong, Guo Xuan. Optical Voltage Transducer Based on Modular Interference in Highly Elliptical-Core Polarization-Maintaining Fiber[J]. Acta Optica Sinica, 2009, 29(1): 219