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Optical fiber relative-humidity sensor with evaporated dielectric coatings on fiber end-face

机译：光纤相对湿度传感器，在光纤端面上具有蒸发的介电涂层

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摘要

An optical fiber relative-humidity sensor (OFRHS) with evaporated dielectric coatings is proposed and demonstrated. The sensitive coatings, composed of multilayers of Ti_3O_5 and SiO_2, form an extrinsic Fabry-Perot cavity on the distal end of the multimode fiber. As the effective refractive index of the porous coatings were correlated with the change of ambient Relative-humidity (RH), which will at last result in the shift of interference fringe. By monitoring the drift of reflected interference fringe under different RH levels, the information about RH of the environment under test can be extracted. Experimental results show that the average sensitivity is 0.43 nm/% RH when environmental RH changes from 1.8% RH to 74.7% RH. The proposed sensor was proved to be high repeatability, little hysteresis and especially highly sensitive to lower moisture measure.
机译：提出并演示了一种具有蒸发的电介质涂层的光纤相对湿度传感器（OFRHS）。由Ti_3O_5和SiO_2的多层组成的敏感涂层在多模光纤的远端形成了外在的Fabry-Perot腔。由于多孔涂层的有效折射率与环境相对湿度（RH）的变化相关，这最终会导致干涉条纹的移动。通过监视不同RH水平下反射干涉条纹的漂移，可以提取有关被测环境RH的信息。实验结果表明，当环境RH从1.8％RH变为74.7％RH时，平均灵敏度为0.43 nm /％RH。事实证明，所提出的传感器具有高重复性，低滞后性，并且对较低的水分测量值特别敏感。

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  • 来源
    《Optical fiber technology》 |2014年第4期|314-319|共6页
  • 作者

    Weijing Xie; Minghong Yang; Yun Cheng; Dongwen Li; Yi Zhang; Zhi Zhuang;

  • 作者单位

    National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China;

    National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China;

    National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China;

    National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China;

    Institute of Structural Mechanics, CAEP, 621900 MianYang, Sichuan, China;

    Institute of Structural Mechanics, CAEP, 621900 MianYang, Sichuan, 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 sensor; Relative-humidity; Electron beam evaporation; Porous films;

    机译：光纤传感器;相对湿度;电子束蒸发;多孔膜;

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