College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China.
Sensors (Basel). 2018 Dec 10;18(12):4358. doi: 10.3390/s18124358.
A kind of all-fiber magnetic field sensing structure is proposed and demonstrated here. The sensing element includes a microfiber knot resonator (MKR) cladded with magnetic fluid (MF). The low-index MgF₂ slab is adopted as the substrate. The sensitivity increases with the decrease of the MKR ring diameter. The achieved maximum magnetic field sensitivity is 277 pm/mT. The results of this work have the potential to promote the development of magnetically controllable optical devices and the design of ultra-compact cost-effective magnetic field sensors.
本文提出并演示了一种全光纤磁场传感结构。传感元件包括微光纤结谐振器（MKR），其外部包裹有磁流体（MF）。低折射率的 MgF₂ 平板被用作衬底。灵敏度随 MKR 环直径的减小而增加。所实现的最大磁场灵敏度为 277 pm/mT。这项工作的结果有望推动磁控光学器件的发展和超紧凑、具有成本效益的磁场传感器的设计。
