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Proceedings Paper

New optical voltage instrument transformer
Author(s): Yan Xu; Qin Zhang; Miaoyuan Ye
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Paper Abstract

A new optical voltage transformer is designed based on the Pockels electro-optic effect of the crystal Bi4Ge3O12 (BGO). Here, the reflection-type longitudinal modulation Pockels cell is described in detail. The longitudinal Pockels effect is called the quadrate electro- optic effect. The electric field could modulate the Polarization State of light as it passes through the transparent material. The optical output of the sensor is a closed quadrate to the electric field, which is performed by means of a digital signal processors. The processing algorithm accounts the optical fringes of the quadrate signals and produces a smooth and continuos reconstruction of applied voltage by using portions of the quadrate signals for interpolation. The technique works equally well regardless of whether the measured voltage is sinusoidal distorted.

Paper Details

Date Published: 14 September 2001
PDF: 4 pages
Proc. SPIE 4414, International Conference on Sensor Technology (ISTC 2001), (14 September 2001); doi: 10.1117/12.440206
Show Author Affiliations
Yan Xu, Huazhong Univ. of Science and Technology (China)
Qin Zhang, Huazhong Univ. of Science and Technology (China)
Miaoyuan Ye, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 4414:
International Conference on Sensor Technology (ISTC 2001)

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