光纤磁流体电磁场传感新方法研究

摘要：以磁流体纳米功能材料为腔内介质，提出一种新型的光纤F-P电磁场传感器，并给出了基于光纤光栅波长扫描的信号解调方法。对磁流体的可控折射率特性及其对电磁场测量原理进行了充分的分析，介绍了传感器系统的结构和原理。对所提出的方法以及影响测量结果的因素进行了初步的实验，结果表明，测量特性具有较好的线性度，且得出温度和磁流体薄膜厚度都会对测量结果有影响的结论。

Fiber optic electromagnetic sensor based on magnetic fluid

Abstract: A novel fiber optic F-P electromagnetic sensor is developed based on magnetic fluid as the medium in F-P interference cavity. A signal demodulation method based on fiber Bragg grating wavelength scanning is proposed. Theory and principle of electromagnetic-controlled refractive index of the magnetic fluid is described as well as the structure of the sensor system. Preliminary experiments are carried out, and the results indicate that there is a fairly good linearity of the measurement characteristic, and the thickness of magnetic fluid film and environmental temperature will affect the measurement results.