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Laser & Optoelectronics Progress, Volume. 56, Issue 13, 132802(2019)

High-Sensitivity Fiber Bragg Grating Strain Sensor Based on Singlemode-Multimode-Singlemode Tapered Structure

Honghai Wang1、*, Simin Peng2, Xin Gui1,2, Changjia Wang2, and Zhengying Li2
Author Affiliations
  • 1 National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, Hubei 430070, China
  • 2 School of Information Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (19)
    Cited By (3)
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    Figures & Tables(10)
    Schematic of fiber fused taper

    Fig. 1. Schematic of fiber fused taper

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    Structural schematic of STMS-FBG

    Fig. 2. Structural schematic of STMS-FBG

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    Reflection spectra of STMS-FBG

    Fig. 3. Reflection spectra of STMS-FBG

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    Schematic of strain experimental setup

    Fig. 4. Schematic of strain experimental setup

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    Diagrams of strain responses. (a) Reflective spectral responses under different strains; (b) fitting curves of strain sensitivity for sensors with different tapered lengths

    Fig. 5. Diagrams of strain responses. (a) Reflective spectral responses under different strains; (b) fitting curves of strain sensitivity for sensors with different tapered lengths

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    Fitting curves of strain sensitivity for different FBG segments

    Fig. 6. Fitting curves of strain sensitivity for different FBG segments

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    Fiber radii at different locations in cone zone. (a) First segment; (b) seventh segment

    Fig. 7. Fiber radii at different locations in cone zone. (a) First segment; (b) seventh segment

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    Diagrams of temperature responses. (a) Reflective spectral responses at different temperatures; (b) fitting curve of temperature sensitivity

    Fig. 8. Diagrams of temperature responses. (a) Reflective spectral responses at different temperatures; (b) fitting curve of temperature sensitivity

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    • Table 1. Comparison of indexes of proposed STMS-FBG sensors and those in previously related reports

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      Table 1. Comparison of indexes of proposed STMS-FBG sensors and those in previously related reports

      SensorSTMS-FBGSMS-FBG1[8]SMS-FBG2[8]SMS-FBG3[10]
      Sensitivity /(pm·με-1)15.52.12.72.7
      Measuring rangeof strain /με0-960-0-2500-200

    • Table 2. Strain sensitivities of fibers with different radii in cone zone

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      Table 2. Strain sensitivities of fibers with different radii in cone zone

      Fiber01020304050607
      Radius /μm20.0222.4524.7330.4735.4241.3648.49
      Sensitivity /(pm·με-1)15.513.611.38.35.74.12.7
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    Honghai Wang, Simin Peng, Xin Gui, Changjia Wang, Zhengying Li. High-Sensitivity Fiber Bragg Grating Strain Sensor Based on Singlemode-Multimode-Singlemode Tapered Structure[J]. Laser & Optoelectronics Progress, 2019, 56(13): 132802

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Jan. 8, 2019

    Accepted: Jan. 28, 2019

    Published Online: Jul. 11, 2019

    The Author Email: Wang Honghai (wanghh@whut.edu.cn)

    DOI:10.3788/LOP56.132802

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology