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Laser & Optoelectronics Progress, Volume. 61, Issue 5, 0506009(2024)

Dual-Peak Resonance Long-Period Fiber Grating Refractive Index Sensor Based on CO2 Laser Technology

Shuang Zhao1, Chao Du1,3、*, Qiuyu Wang1, Bin Jia1, Li Zhang1, Liqin Cui1, and Xiao Deng1,2、**
Author Affiliations
  • 1College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • 2Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • 3State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan 030006, Shanxi, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
    Equations (1)
    References (23)
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    Figures & Tables(11)
    Schematic diagram of LPFG fabricated by CO2 laser

    Fig. 1. Schematic diagram of LPFG fabricated by CO2 laser

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    Phase matching curves of LPFG: (a) Conventional SMF; (b) bend insensitive SMF

    Fig. 2. Phase matching curves of LPFG: (a) Conventional SMF; (b) bend insensitive SMF

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    Phase matching curves of LPFG: (a) Thin SMF Ⅰ; (b) thin SMF Ⅱ

    Fig. 3. Phase matching curves of LPFG: (a) Thin SMF Ⅰ; (b) thin SMF Ⅱ

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    Experimental device of CO2 laser fabricating LPFG

    Fig. 4. Experimental device of CO2 laser fabricating LPFG

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    Physical diagram of etched LPFG under the electron microscope

    Fig. 5. Physical diagram of etched LPFG under the electron microscope

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    Refractive index response of LPFG based on conventional SMF. (a) Transmission spectra of etched LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

    Fig. 6. Refractive index response of LPFG based on conventional SMF. (a) Transmission spectra of etched LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

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    Physical diagram of etched LPFG under the electron microscope

    Fig. 7. Physical diagram of etched LPFG under the electron microscope

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    Refractive index response of LPFG based on bend insensitive SMF. (a) Transmission spectra of LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

    Fig. 8. Refractive index response of LPFG based on bend insensitive SMF. (a) Transmission spectra of LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

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    Refractive index response of LPFG based on thin SMF Ⅰ. (a) Transmission spectra of LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

    Fig. 9. Refractive index response of LPFG based on thin SMF Ⅰ. (a) Transmission spectra of LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

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    Refractive index response of LPFG thin SMF Ⅱ. (a) Transmission spectra of LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

    Fig. 10. Refractive index response of LPFG thin SMF Ⅱ. (a) Transmission spectra of LPFG under different refractive indexes; (b) relationship between resonance wavelength and refractive index variations

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    • Table 1. Parameters of SMF

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      Table 1. Parameters of SMF

      FiberCladding diameter /μmCore diameter /μmCladding refractive indexCore refractive index
      Conventional SMF1258.21.46281.4681
      Bend insensitive SMF80/19.36.41.45766/1.45721.47021
      Thin SMF Ⅰ805.61.4571.469
      Thin SMF Ⅱ805.21.4601.471
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    Shuang Zhao, Chao Du, Qiuyu Wang, Bin Jia, Li Zhang, Liqin Cui, Xiao Deng. Dual-Peak Resonance Long-Period Fiber Grating Refractive Index Sensor Based on CO2 Laser Technology[J]. Laser & Optoelectronics Progress, 2024, 61(5): 0506009

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Nov. 30, 2022

    Accepted: Dec. 12, 2022

    Published Online: Mar. 12, 2024

    The Author Email: Chao Du (duchao@tyut.edu.cn), Xiao Deng (dengxiao@tyut.edu.cn)

    DOI:10.3788/LOP223219

    CSTR:32186.14.LOP223219

    Topics

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