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Chinese Journal of Lasers, Volume. 51, Issue 17, 1710001(2024)

Cascaded Fiber-Optic FPI-SPR Liquid Thermo-Optic Coefficient Sensor

Aobo Jin1, Jianhua Chang1,2、*, Ziyi Hu1, Yao Xu1, and Ming Chen1
Author Affiliations
  • 1School of Electronic and Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu , China
  • 2Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (23)
    Cited By (2)
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    Figures & Tables(10)
    Sensor structure diagram

    Fig. 1. Sensor structure diagram

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    Sensor fabrication process. (a) Fiber tip dipped in PDMS; (b) structure diagram of PDMS after curing; (c) fiber inserted into silicon tube; (d) Ag film plated on NCF

    Fig. 2. Sensor fabrication process. (a) Fiber tip dipped in PDMS; (b) structure diagram of PDMS after curing; (c) fiber inserted into silicon tube; (d) Ag film plated on NCF

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    Optical microscope images of fiber FPI. (a) End face; (b) FP cavity

    Fig. 3. Optical microscope images of fiber FPI. (a) End face; (b) FP cavity

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    Interference and transmission spectra of sensor. (a) Interference spectrum; (b) transmission spectrum

    Fig. 4. Interference and transmission spectra of sensor. (a) Interference spectrum; (b) transmission spectrum

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    Diagram of experimental setup

    Fig. 5. Diagram of experimental setup

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    Refractive index response characteristics of sensor. (a) Transmission spectra; (b) linear fitting diagram of transmission spectrum; (c) interference spectra; (d) linear fitting diagram of interference spectrum

    Fig. 6. Refractive index response characteristics of sensor. (a) Transmission spectra; (b) linear fitting diagram of transmission spectrum; (c) interference spectra; (d) linear fitting diagram of interference spectrum

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    Temperature response characteristics of sensor. (a) Interference spectra; (b) fitting result of interference spectrum; (c) transmission spectra; (d) fitting result of transmission spectrum drift

    Fig. 7. Temperature response characteristics of sensor. (a) Interference spectra; (b) fitting result of interference spectrum; (c) transmission spectra; (d) fitting result of transmission spectrum drift

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    Ethanol results detected by sensor at different temperatures. (a) Interference spectra; (b) fitting result of interference spectrum drift; (c) transmission spectra; (d) fitting result of transmission spectrum drift

    Fig. 8. Ethanol results detected by sensor at different temperatures. (a) Interference spectra; (b) fitting result of interference spectrum drift; (c) transmission spectra; (d) fitting result of transmission spectrum drift

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    • Table 1. Performance comparison of temperature and refractive index sensors

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      Table 1. Performance comparison of temperature and refractive index sensors

      Sensor typeSensitization materialRI sensitivity/ （nm·RIU-1）Temperature sensitivity /（nm·℃-1）Range /℃Year
      Proposed sensorPDMS & Ag2913.680.59720‒802023
      SPR-MZI［22］Au1947.4050.3425.66‒51.002022
      SPR-MZI［23］Au1899-1.427‒432021
      SPR-MMI［19］Au2061.60.037920‒802020
      SPR-FPI［20］Au & PDMS2565.40.39420‒802021

    • Table 2. Measurement value comparison of ethanol thermo-optic coefficient

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      Table 2. Measurement value comparison of ethanol thermo-optic coefficient

      Sensor typeTOC /（RIU·℃-1）Error /%Year
      Proposed sensor-3.868×10-40.822023
      MMI［18］-3.95×10-41.282021
      SPR-MMI［19］-4.2×10-47.692020
      MMI［17］-3.117×10-420.072018
      MFFPI［21］-3.688×10-45.432015
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    Aobo Jin, Jianhua Chang, Ziyi Hu, Yao Xu, Ming Chen. Cascaded Fiber-Optic FPI-SPR Liquid Thermo-Optic Coefficient Sensor[J]. Chinese Journal of Lasers, 2024, 51(17): 1710001

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    Paper Information

    Category: remote sensing and sensor

    Received: Oct. 19, 2023

    Accepted: Dec. 7, 2023

    Published Online: Aug. 29, 2024

    The Author Email: Chang Jianhua (jianhuachang@nuist.edu.cn)

    DOI:10.3788/CJL231306

    CSTR:32183.14.CJL231306

    Topics

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