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8 January 2008 Application of the Pockels effect to electric current measurement
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The traditional way to measure an electric field electrically disturbs the original field, so that can cause a number of measuring problems. Using a Pockels' crystal to measure an electric field has several advantages over electrical methods, such as interference from electromagnetic radiation, high sensitivity and wide frequency bandwidth. This paper presents a kind of new optical method for measuring electric current, this new method makes the Sensing Technology on Pockels effect, Faraday effect and optical Technology together. The sensor combines a Rogowski coil with a passive integrator located in the high-voltage environment. Test results from 20 A to 1.5 kA show the sensor to be highly linear, exceeding 0.2% linearity standards.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fei Long, Jianhuan Zhang, Zhiwei Yuan, and Chunrong Xie "Application of the Pockels effect to electric current measurement", Proc. SPIE 6838, Optoelectronic Devices and Integration II, 68381H (8 January 2008);

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