Based on the anisotropic distribution of magnetic nanoparticles within magnetic fluid under an external magnetic field, a novel, to the best of our knowledge, vector magnetic field sensor based on an orthogonal offset spliced optical fiber structure cascaded with fiber taper has been proposed. The expression of interference dip wavelength with respect to external magnetic field is formulated, and the dual-parameter sensing matrix is established. Simultaneous measurement of magnetic field intensity and direction is realized. The corresponding physical principle is clarified. The sensing properties are experimentally investigated and theoretically verified. The theoretical results are in good agreement with the experimental ones.

中文翻译：

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基于磁流体包覆正交偏置拼接光纤的矢量磁场传感器

基于外部磁场下磁性流体中磁性纳米粒子的各向异性分布，据我们所知，提出了一种新型矢量磁场传感器，该传感器基于与光纤锥度级联的正交偏移拼接光纤结构。制定了干扰倾角波长相对于外磁场的表达式，并建立了双参数传感矩阵。实现了磁场强度和方向的同时测量。阐明了相应的物理原理。对传感特性进行了实验研究和理论验证。理论结果与实验结果吻合较好。