高灵敏度光纤弱磁传感器

High sensitive optical fiber weak magnetic sensor

本文报道了一种磁场检测灵敏度为10^(-5)Oe量级的光纤弱磁传感器。文中提供了传感头与检测系统的设计理论和方法。

An optical fiber weak magnetic sensor with sensitivity of 10-5 Oe. is reported. The device uses metal-glass as magnetostrictive material and an Alternating Current Phase Tracking (PTAC) homodyne system for phase detecting in optical fiber M-Z interferometer. Nulling technique eliminates any problems arising from the magnetic hysteresis effects of the magnetostrictive material which affect its magnetometer output. The theory and design method of the transducer and the phase detecting system are analyzed in detail.