Tang Jiali, Pu Shengli, Dong Shaohua, Luo Longfeng
College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
Sensors (Basel). 2014 Oct 14;14(10):19086-94. doi: 10.3390/s141019086.
Magnetic field sensing based on magnetic-fluid-clad multimode-singlemode- multimode fiber structures is proposed and experimentalized. The structures are fabricated out using fiber fusion splicing techniques. The sensing principle is based on the interference between the core mode and cladding modes. Two interference dips are observed in our spectral range. Experimental results indicate that the magnetic field sensing sensitivities of 215 pm/mT and 0.5742 dB/mT are obtained for interference dip around 1595 nm. For interference dip around 1565 nm, the sensitivities are 60.5 pm/mT and 0.4821 dB/mT. The response of temperature is also investigated. The temperature sensitivity for the dip around 1595 nm is obtained to be 9.93 pm/°C.
提出并实验验证了基于磁流体包覆多模-单模-多模光纤结构的磁场传感。这些结构采用光纤熔接技术制造。传感原理基于芯模与包层模之间的干涉。在我们的光谱范围内观察到两个干涉凹陷。实验结果表明，对于1595nm左右的干涉凹陷，磁场传感灵敏度分别为215pm/mT和0.5742dB/mT。对于1565nm左右的干涉凹陷，灵敏度分别为60.5pm/mT和0.4821dB/mT。还研究了温度响应。1595nm左右凹陷的温度灵敏度为9.93pm/°C。
