New design of optical electric-current sensor for sensitivity improvement

被引：12
|
作者：
Yi, BS [1 ]
Chu, CB [1 ]
Chiang, S [1 ]
Chung, HSH [1 ]
机构：
[1] City Univ Hong Kong, Dept Elect Engn, Optoelect Res Ctr, Kowloon, Hong Kong, Peoples R China
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2000年 / 49卷 / 02期
关键词：
critical angle reflection; electric current measurement; Faraday effect; magneto-optical field sensor;
D O I：
10.1109/19.843089
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A new design of optical electric-current sensor based on the Faraday effect is proposed and demonstrated experimentally. The sensor probe is a precisely cut glass prism with a high reflection coating on the base surface at the far end, Inside the prism, the light beam is allowed to bounce up and down at the critical angle and retrace its path back by the reflection coating. The sensor demonstrated offers a sensitivity of six times higher as compared with conventional designs and suffers from fewer optical losses. The design can also reduce the package size of the sensor probe.
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页码：418 / 423
页数：6
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