Chinese Journal of Quantum Electronics, Volume. 42, Issue 2, 286(2025)

A polymer⁃encapsulated fiber Bragg grating ultrasonic sensor

TU Xinghua and ZHAO Haiyang
Author Affiliations
  • Research Center of Optoelectronic Sensing Engineering, College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
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    Figures & Tables(11)
    FBG model with polymer package
    Schematic of edge filtering method
    Grating strain varying with Young's modulus
    Grating strain varying with Poisson's ratios
    Reflection spectra of fiber grating under three polymer encapsulations
    Designed diagram of the fiber grating ultrasonic sensing experimental system
    Spectrum of the fiber Bragg grating
    Voltage waveform diagram of gratings at different frequencies. (a) 60 kHz; (b) 48 kHz; (c) 30 kHz
    Effect of sound source distance on signal voltage under different materials. (a) Bare FBG; (b) PVC; (c) ABR; (d) PU
    Peak voltage varies with distance
    • Table 1. Different material characteristic parameters

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      Table 1. Different material characteristic parameters

      ParameterBare fiber gratingPVCABRPU
      Young's modulus E1/GPa72.003.502.001.00
      Poisson ratio v10.170.380.380.45
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    Xinghua TU, Haiyang ZHAO. A polymer⁃encapsulated fiber Bragg grating ultrasonic sensor[J]. Chinese Journal of Quantum Electronics, 2025, 42(2): 286

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    Paper Information

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    Received: Jun. 21, 2023

    Accepted: --

    Published Online: Apr. 1, 2025

    The Author Email:

    DOI:10.3969/j.issn.1007-5461.2025.02.014

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