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Acta Optica Sinica, Volume. 43, Issue 20, 2006002(2023)

Flywheel-Like Fiber-Optic Fabry-Perot Acoustic Vector Sensor Based on Diaphragm Coupling Gain Principle

Xueping Li1,2,3, Shuang Wang1,2,3、*, Peng Zhang1,2,3, Junfeng Jiang1,2,3, Haokun Yang1,2,3, and Tiegen Liu1,2,3
Author Affiliations
  • 1School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
  • 2Key Laboratory of the Ministry of Education on Optoelectronic Information Technology, Tianjin University,Tianjin 300072, China
  • 3Institute of Optical Fiber Sensing, Tianjin University, Tianjin 300072, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (13)
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    References (31)
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    Figures & Tables(13)
    Flywheel-coupling diaphragm. (a) Schematic of planar structure; (b) physical simplified model

    Fig. 1. Flywheel-coupling diaphragm. (a) Schematic of planar structure; (b) physical simplified model

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    Mode shapes of flywheel-coupling diaphragm. (a) Rocking mode; (b) bending mode

    Fig. 2. Mode shapes of flywheel-coupling diaphragm. (a) Rocking mode; (b) bending mode

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    Frequency response of flywheel-coupling diaphragm. (a) Displacement response; (b) phase difference response

    Fig. 3. Frequency response of flywheel-coupling diaphragm. (a) Displacement response; (b) phase difference response

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    Simulated positioning curves of phase difference of flywheel-coupling diaphragm. (a) Phase difference changed with incident angle; (b) gain changed with incident angle

    Fig. 4. Simulated positioning curves of phase difference of flywheel-coupling diaphragm. (a) Phase difference changed with incident angle; (b) gain changed with incident angle

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    Schematic of fiber-optic F-P sensor structure

    Fig. 5. Schematic of fiber-optic F-P sensor structure

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    Fiber-optic F-P sensor contrast with cavity length under different fiber end face inclinations

    Fig. 6. Fiber-optic F-P sensor contrast with cavity length under different fiber end face inclinations

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    Flywheel-coupling diaphragm fiber-optic F-P acoustic vector sensor. (a) Schematic of the sensor structure; (b) normalized spectra of F-P microcavity

    Fig. 7. Flywheel-coupling diaphragm fiber-optic F-P acoustic vector sensor. (a) Schematic of the sensor structure; (b) normalized spectra of F-P microcavity

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    Experimental system. (a) Acoustic test environment; (b) optical signal demodulation system

    Fig. 8. Experimental system. (a) Acoustic test environment; (b) optical signal demodulation system

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    Flowchart of phase-sensitive detection algorithm

    Fig. 9. Flowchart of phase-sensitive detection algorithm

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    Phase difference frequency response of flywheel-coupling fiber-optic F-P acoustic vector sensor

    Fig. 10. Phase difference frequency response of flywheel-coupling fiber-optic F-P acoustic vector sensor

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    Phase difference positioning curves at 7.2 kHz acoustic frequency

    Fig. 11. Phase difference positioning curves at 7.2 kHz acoustic frequency

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    Phase difference positioning curves at 5-7.4 kHz acoustic frequency. (a) Flywheel-coupling diaphragm fiber-optic F-P acoustic vector sensor; (b) uncoupled fiber-optic F-P acoustic vector sensor

    Fig. 12. Phase difference positioning curves at 5-7.4 kHz acoustic frequency. (a) Flywheel-coupling diaphragm fiber-optic F-P acoustic vector sensor; (b) uncoupled fiber-optic F-P acoustic vector sensor

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    • Table 1. Simulation parameters of flywheel-coupling diaphragm

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      Table 1. Simulation parameters of flywheel-coupling diaphragm

      ParameterValue
      D/mm10
      d/mm9
      2y0 /mm10
      ρ/（kg·m-3）7860
      E/GPa198
      σ0.29
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    Xueping Li, Shuang Wang, Peng Zhang, Junfeng Jiang, Haokun Yang, Tiegen Liu. Flywheel-Like Fiber-Optic Fabry-Perot Acoustic Vector Sensor Based on Diaphragm Coupling Gain Principle[J]. Acta Optica Sinica, 2023, 43(20): 2006002

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Mar. 2, 2023

    Accepted: May. 9, 2023

    Published Online: Oct. 23, 2023

    The Author Email: Wang Shuang (shuangwang@tju.edu.cn)

    DOI:10.3788/AOS230612

    Topics

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