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Small optical magnetic-field sensor that uses rare-earth iron garnet films based on the Faraday effect

机译:基于法拉第效应的使用稀土铁石榴石薄膜的小型光学磁场传感器

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摘要

Highly accurate optical magnetic-field probe sensors that use iron garnet films have been developed. New probe-type sensors were designed with a confocal optical system. A new garnet composition, Bi_(0.98)Gd_(0.92)La_(0.03)Y_(1.07)Fe_(4.72)Ga_(0.28)O_(12), was found that shows high temperature stability for a sensitivity of less than 2.0% from -20 to +80℃. The linearity error of the sensor output was within 1.0% for alternating magnetic fields from 0.3 to 42 mT. An optical current transformer that uses the proposed sensor has an ac linearity of 1.0% for input current up to nearly 300 A. The sensor realized high performance in actual use.
机译:已经开发了使用铁石榴石薄膜的高精度光磁场探针传感器。新的探针型传感器设计有共焦光学系统。发现了一种新的石榴石成分Bi_(0.98)Gd_(0.92)La_(0.03)Y_(1.07)Fe_(4.72)Ga_(0.28)O_(12),显示出较高的高温稳定性,灵敏度低于2.0% -20至+ 80℃。对于0.3至42 mT的交变磁场,传感器输出的线性误差在1.0%以内。使用建议的传感器的光学电流互感器在输入电流高达300 A时具有1.0%的交流线性度。该传感器在实际使用中实现了高性能。

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