Optical voltage sensor using a pulse-controlled electrooptic quarter waveplate

Author

Li, Changsheng ; Cui, Xiang ; Yamaguchi, Ichirou ; Yokota, Masayuki ; Yoshino, Toshihiko

Author_Institution

Dept. of Electr. Eng., North China Electr. Power Univ., Baoding, China

Volume

54

Issue

1

fYear

2005

Firstpage

273

Lastpage

277

Abstract

An optical voltage sensor is presented which can be used for the measurement of dc voltage by use of a Pockels crystal associated with a pulse-controlled electrooptic quarter waveplate. The measurand dc voltage signal is converted into the amplitude of an ac pulse-modulated voltage-sensing signal. Therefore, the output sensing signal is immune to electromagnetic interference owing to the applications of pulse modulation and lock-in amplifying techniques. In addition, the voltage-sensing signal is obtained from a single light path and free from light intensity fluctuations. The dc voltage of ±0.4 to ±180 V has been measured with 1.8% nonlinear error.

Keywords

Pockels effect; electro-optical devices; optical sensors; voltage measurement; 0.4 to 180 V; AC pulse-modulated voltage-sensing signal; DC voltage measurement; DC voltage signal; Pockels crystal; Pockels effect; electromagnetic interference; light intensity fluctuations; lock-in amplifying techniques; nonlinear error; optical voltage sensor; output sensing signal; polarization converter; pulse modulation; pulse-controlled electrooptic quarter waveplate; single light path; Electromagnetic interference; Electromagnetic measurements; Electrooptic devices; Nonlinear optics; Optical pulses; Optical retarders; Optical sensors; Pulse amplifiers; Pulse measurements; Voltage measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2004.838128

Filename

1381826