Abstract
The technique of non-reciprocal optical phase modulation known from fiber gyroscopes is adapted to interrogate a polarimetric optical voltage sensor. The piezoelectric deformation of a transducer by an applied ac voltage is transmitted to a birefringent fiber resulting in a periodic phase shift of the two orthogonal polarizations of the fundamental fiber mode. A modulator at the detector end of the sensor introduces a nonreciprocal phase modulation of the light waves. The voltage is recovered from the first and second harmonics of the modulator frequency and side bands in the detected signal.
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