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Optical fiber magnetic field sensor based on birefringence in liquid core optical waveguide

机译：基于液芯光波导中双折射的光纤磁场传感器

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摘要

An optical fiber magnetic field sensor based on the birefringence of magnetic fluid is proposed by filling the magnetic fluid into a hollow-core waveguide. The birefringence characteristics of magnetic fluids with different concentrations tuned by magnetic field were investigated under different magnetic fields when the filled hollow-core waveguide is placed in a Sagnac loop. As the magnetic field increases, the internal chain-like structure of the magnetic fluid increases, resulting in changes in birefringence. The experimental results show that the device has a highly linear response to the variation of magnetic field intensity in the range of 0-300 Oe with the maximum sensitivity of 29.2 pm/Oe and resolution of 0.68 Oe. The proposed magnetic field sensor has such advantages as ease of fabrication, simple structure, low cost and it is expected to find potential applications in the magnetic field measurement with high accuracy, optical fiber gyroscopes, magneto-optic modulators and so on. Due to the external field tunability, the device also provides a promising technology for microfluidics research.
机译：通过将磁流体填充到空心波导中，提出了一种基于磁流体双折射的光纤磁场传感器。当将填充的空心波导放置在Sagnac回路中时，研究了在不同磁场下不同浓度的磁性流体的双折射特性。随着磁场的增加，磁性流体的内部链状结构也会增加，从而导致双折射发生变化。实验结果表明，该器件对磁场强度在0-300 Oe范围内的变化具有高度线性响应，最大灵敏度为29.2 pm / Oe，分辨率为0.68 Oe。提出的磁场传感器具有制造容易，结构简单，成本低的优点，并且有望在高精度的磁场测量，光纤陀螺仪，磁光调制器等中找到潜在的应用。由于外部场的可调性，该设备还为微流体研究提供了有希望的技术。

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  • 来源
    《Optical fiber technology》 |2019年第7期|114-117|共4页
  • 作者

    Wang Weiheng; Zhang Hongmin; Li Bin; Li Zhen; Miao Yinping;

  • 作者单位

    Tianjin Univ Technol, Sch Elect & Elect Engn, Tianjin Key Lab Film Elect & Communicate Devices, Tianjin 300384, Peoples R China;

    Tianjin Univ Technol, Sch Elect & Elect Engn, Tianjin Key Lab Film Elect & Communicate Devices, Tianjin 300384, Peoples R China;

    Tianjin Univ Technol, Sch Elect & Elect Engn, Tianjin Key Lab Film Elect & Communicate Devices, Tianjin 300384, Peoples R China;

    Tianjin Univ Technol, Sch Elect & Elect Engn, Tianjin Key Lab Film Elect & Communicate Devices, Tianjin 300384, Peoples R China;

    Tianjin Univ Technol, Sch Elect & Elect Engn, Tianjin Key Lab Film Elect & Communicate Devices, Tianjin 300384, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Optical fiber devices; Magnetooptic effects; Birefringence; Optofluidic in fiber;

    机译：光纤器件;磁光效应;双折射;光纤中的光流;

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