Abstract
We present a novel fiber-optic sensor for direct measurement of the line integral , i.e., the difference in the electric potentials at two points A and B of an electric field distribution E(r). Conventional optical voltage sensors, which are commonly based on electrooptic effects, measure Δϕ only indirectly by a local field measurement.1 A major disadvantage of these sensors is their limited versatility: generally the sensor calibration is valid only for one specific electrode configuration and one sensor position within the given field distribution. This drawback does not exist if the voltage is determined from a line integration of the electric field.
© 1988 Optical Society of America
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