Electro-optic Kerr effects in spun high-birefringent fiber current sensors

Abstract

We have measured the influence of the electro-optic (EO) Kerr effect on the response of a spun highbirefringence (hi-bi) fiber current sensor in a simulated Gas Insulated System (GIS) environment. We show that the EO Kerr effect distorts the response of the sensor, and that the second-harmonic signal has a small dependence on the input polarizer angle. We also, have theoretically modeled a polarimetric current sensor using spun hi-bi fiber and compared the models to our experimental results. With the models we predict the response of a fiber current sensor in a 550 kV GIS application.