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Laser & Optoelectronics Progress, Volume. 61, Issue 17, 1706006(2024)

Research on Dual-Core Flexible Belt Inclination Optic Fiber Based on Ultra-Weak Fiber Bragg Gratings

Guangqin Tong1, Dingming Liu1, Jianglou Huang2,3、*, Yongjun Liu1, and Yunrui He2,3
Author Affiliations
  • 1China Three Gorges Corporation Limited, Yichang 443002, Hubei, China
  • 2Hubei Engineering Research Center of Weak Magnetic-field Detection, China Three Gorges University, Yichang 443002, Hubei, China
  • 3College of Science, China Three Gorges University, Yichang 443002, Hubei, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (16)
    Equations (13)
    References (20)
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    Figures & Tables(16)
    Axis deformation diagram of microstructure. (a) Before bending; (b) after bending

    Fig. 1. Axis deformation diagram of microstructure. (a) Before bending; (b) after bending

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    Schematic diagram of tangent angle recursion algorithm

    Fig. 2. Schematic diagram of tangent angle recursion algorithm

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    Schematic diagram of deformation of inclination optical cable

    Fig. 3. Schematic diagram of deformation of inclination optical cable

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    Model simulation. (a) Simulation model coordinate system; (b) simulation model cross-section; (c) strain distribution after deformation; (d) strain and distance relationship curve

    Fig. 4. Model simulation. (a) Simulation model coordinate system; (b) simulation model cross-section; (c) strain distribution after deformation; (d) strain and distance relationship curve

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    Strain and inclination relationship diagram

    Fig. 5. Strain and inclination relationship diagram

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    Optical cable emulation. (a) Force deformation diagram; (b) relationship between strain and inclination

    Fig. 6. Optical cable emulation. (a) Force deformation diagram; (b) relationship between strain and inclination

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    Optical cable model diagram

    Fig. 7. Optical cable model diagram

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    Diagram of experimental setup

    Fig. 8. Diagram of experimental setup

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    Sensor strain calibration curve

    Fig. 9. Sensor strain calibration curve

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    Temperature calibration curve of sensor 1 fiber

    Fig. 10. Temperature calibration curve of sensor 1 fiber

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    Temperature calibration curve of sensor 2 fiber

    Fig. 11. Temperature calibration curve of sensor 2 fiber

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    Deformation inversion diagram of ribbon optical cable under different loads

    Fig. 12. Deformation inversion diagram of ribbon optical cable under different loads

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    Relative error of actual inclination angle and theoretical inclination angle under different loads

    Fig. 13. Relative error of actual inclination angle and theoretical inclination angle under different loads

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    Relationship between tilt angle at center of optical cable and central wavelength change value under different loads

    Fig. 14. Relationship between tilt angle at center of optical cable and central wavelength change value under different loads

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    • Table 1. Inclination value of unit strain generated by ultra-weak grating at different R values

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      Table 1. Inclination value of unit strain generated by ultra-weak grating at different R values

      Rθ /（°）
      0.01130.015070.018830.030130.06026
      -5ε9.87×10-71.32×10-61.64×10-62.63×10-65.26×10-6
      5ε9.87×10-71.32×10-61.64×10-62.63×10-65.26×10-6
      -4ε7.90×10-71.05×10-61.32×10-62.11×10-64.21×10-6
      4ε7.90×10-71.05×10-61.32×10-62.11×10-64.21×10-6
      -3ε5.92×10-77.90×10-79.87×10-71.58×10-63.16×10-6
      3ε5.92×10-77.90×10-79.87×10-71.58×10-63.16×10-6
      -2ε3.95×10-75.27×10-76.58×10-71.05×10-62.11×10-6
      2ε3.95×10-75.27×10-76.58×10-71.05×10-62.11×10-6
      -ε1.98×10-72.64×10-73.30×10-75.28×10-71.06×10-6
      ε1.98×10-72.64×10-73.30×10-75.28×10-71.06×10-6

    • Table 2. Measured inclination angle and inversion inclination angle

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      Table 2. Measured inclination angle and inversion inclination angle

      Load /kgActual deflection /mmInversion deflection /mmActual inclination angle θr /（°）Theoretical inclination angle θt /（°）
      0.510.19.250.57460.5282
      1.019.818.141.12071.0278
      1.529.627.031.64841.5126
      2.039.736.642.26832.0984
      2.550.446.332.90812.6874
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    Guangqin Tong, Dingming Liu, Jianglou Huang, Yongjun Liu, Yunrui He. Research on Dual-Core Flexible Belt Inclination Optic Fiber Based on Ultra-Weak Fiber Bragg Gratings[J]. Laser & Optoelectronics Progress, 2024, 61(17): 1706006

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Nov. 6, 2023

    Accepted: Jan. 18, 2024

    Published Online: Sep. 11, 2024

    The Author Email: Jianglou Huang (hjl.phd@qq.com)

    DOI:10.3788/LOP232440

    CSTR:32186.14.LOP232440

    Topics

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