基于磁通集中器的光纤法拉第效应磁场传感器。
Fiber-optic Faraday-effect magnetic-field sensor based on flux concentrators.
作者信息
Deeter M N
出版信息
Appl Opt. 1996 Jan 1;35(1):154-7. doi: 10.1364/AO.35.000154.
The principles and performance of a fiber-optic Faraday-effect magnetic-field sensor designed around an yttrium-iron-garnet (YIG) sensing element and two flux concentrators are described. The system design exploits the technique of polarization-rotated reflection in which a single polarization-maintaining optical fiber links the sensor head to the optical source and detection system. In the sensing head, ferrite flux concentrators are magnetically coupled to the YIG sensing element to achieve maximum sensitivity. The system exhibits a noise equivalent field of 6 pT/√Hz and a 3-dB bandwidth of~10 MHz.
描述了一种围绕钇铁石榴石（YIG）传感元件和两个磁通集中器设计的光纤法拉第效应磁场传感器的原理和性能。该系统设计采用了偏振旋转反射技术，其中单根保偏光纤将传感器头连接到光源和检测系统。在传感头中，铁氧体磁通集中器与YIG传感元件磁耦合，以实现最大灵敏度。该系统的等效噪声场为6 pT/√Hz，3 dB带宽约为10 MHz。
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