Title :
Optical voltage sensor based on electrooptic crystal multiplier
Author :
Li, Changsheng ; Yoshino, Toshihiko
Author_Institution :
Dept. of Electron. Eng., Gunma Univ., Japan
fDate :
5/1/2002 12:00:00 AM
Abstract :
A novel optical voltage sensor based on the electrooptic crystal multiplier is proposed and experimentally investigated. Different from the conventional bulk-type optical voltage sensor, the optical sensing unit is simply composed of an electrooptic crystal and two polarizers and does not need quarter wave-plate. By using different modulation approaches, both ac and dc voltages can be measured with controllable sensitivity and measurement range. The effective value of ac voltage can also be measured with nonmodulation approach. The dc voltage from 0.1 to 120 V and 50 Hz ac voltage from 0.05 to 100 V have been measured with good linearity. The potential applications of the proposed voltage sensor include the low voltage measurement in the field of electromagnetic compatibility and the high voltage measurement in electric power industry.
Keywords :
Pockels effect; electro-optical devices; fibre optic sensors; optical polarisers; polarimetry; voltage measurement; 0.05 to 100 V; 0.1 to 120 V; AC voltages; DC voltages; Pockels effect; controllable measurement range; controllable sensitivity; electromagnetic compatibility; electrooptic crystal multiplier; high voltage measurement; low voltage measurement; optical voltage sensor; polarizers; pulse amplitude modulation; Electromagnetic measurements; Electrooptic devices; Linearity; Low voltage; Optical modulation; Optical polarization; Optical retarders; Optical sensors; Voltage control; Voltage measurement;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2002.1007938
