基于矢量光束的磁流体光纤传感器研究

Based on the interaction between vector beam and magnetic fluid, exploring physical mechanism of magneto-optical properties and then developing a new type of optical fiber magnetic field sensor is of important scientific significance. So this project proposes to build a theoretical model of the interaction between vector beam and magnetic fluid based on hollow ring core fibers, in order to solve the key scientific problem of utilizing vector beam to explore the magneto-optical properties of magnetic fluid. Technically, based on the combined MCVD and ALD technology, hollow ring core sensing fiber is developed to solve the problem of stable transmission of the vector beam mode. Then, a magnetic fluid fiber sensor is developed to analyze the physical process of the evanescent wave interaction between the vector mode and the magnetic fluid, and a vector beam magneto-optical response detection system will be constructed. Finally, optical fiber magnetic field sensor that can accurately measure external magnetic field parameters will be developed. The expected results will provide theoretical support for the development of new fiber optic magnetic field sensors and open up new technological approaches.

基于矢量光束与磁流体相互作用，探索磁流体磁光特性物理机理，进而研发新型光纤磁场传感器，这对新型磁场传感器的研究具有重要的科学研究意义。为此，本项目提出基于中空环形芯光纤的矢量模式与磁流体相互作用，理论上，建立矢量光束与磁流体相互作用理论模型，解决利用矢量光束探索磁流体磁光特性的关键科学问题；技术上，基于MCVD与ALD融合技术，研制中空环形芯传感光纤，解决矢量光束模式稳定传输问题；在此基础上，研制磁流体光纤传感器，着重分析矢量模式渐逝波与磁流体相互作用的物理过程，并构建矢量模式磁光响应检测系统，最终，研制出可以对外界磁场参量实现精准测量的光纤传感器。预期成果将为开发新型光纤磁场传感器提供理论支撑并开辟新的技术途径。

基于矢量光束与磁流体相互作用，探索磁流体磁光特性物理机理，进而研发新型光纤磁场传感器，这对新型磁场传感器的研究具有重要的科学研究意义。为此，本项目以矢量光束作为输入场，建立了矢量光束在磁流体中的琼斯矩阵传输模型，分析了不同磁场参数条件下矢量光束的输出特性。实验上基于磁流体薄膜搭建了矢量光束磁场传感系统，同时检测出二维磁场强度和方向，其磁场强度误差不超过10Gs，磁场方向误差不超过2°。在此基础上，将磁流体与涡旋光束结合，研究了基于模式叠加方法的传感理论，分析了外界磁场对涡旋光束强度的影响；并对环形芯光纤进行侧抛，与磁流体结合制备了光纤磁场传感器，磁场传感灵敏度为0.158Gs-1。该项目成果为开发新型光纤磁场传感器的研究提供了重要的参考价值。

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