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Acta Optica Sinica, Volume. 43, Issue 10, 1006003(2023)

Optical-Fiber Refractive Index Sensor Based on Lossy Mode Resonance Enhanced by TiO2 Nanoparticles

Xiaoshuang Dai1,2,3, Shuang Wang1,2,3、*, Ke Tan1,2,3, Tong Huo1,2,3, Junfeng Jiang1,2,3, 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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    References (22)
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    Figures & Tables(9)
    LMR sensor structure and sensing principle. (a) LMR sensor structure; (b) LMR sensing principle

    Fig. 1. LMR sensor structure and sensing principle. (a) LMR sensor structure; (b) LMR sensing principle

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    LMR spectra based on ITO. (a) Relationship between ITO thickness and resonance wavelength of LMR sensor; (b) high order resonance spectrum

    Fig. 2. LMR spectra based on ITO. (a) Relationship between ITO thickness and resonance wavelength of LMR sensor; (b) high order resonance spectrum

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    Simulation results of refractive index sensing of LMR sensor with ITO thickness of 430 nm. (a) Normalized spectra corresponding to different refractive indices; (b) relationship between resonance wavelength and refractive index

    Fig. 3. Simulation results of refractive index sensing of LMR sensor with ITO thickness of 430 nm. (a) Normalized spectra corresponding to different refractive indices; (b) relationship between resonance wavelength and refractive index

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    SEM images. (a)(b) Cross section of ITO-LMR sensor and its local enlargement; (c)(d) TiO2 nanoparticles on the surface of TiO2-ITO-LMR sensor and their local enlargement

    Fig. 4. SEM images. (a)(b) Cross section of ITO-LMR sensor and its local enlargement; (c)(d) TiO2 nanoparticles on the surface of TiO2-ITO-LMR sensor and their local enlargement

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    Schematic of refractive index sensing experiment device based on LMR

    Fig. 5. Schematic of refractive index sensing experiment device based on LMR

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    ITO-LMR refractive index sensing test results. (a) Normalized transmission spectra of ITO-LMR sensor under different refractive indices; (b) fitting sensitivity curve

    Fig. 6. ITO-LMR refractive index sensing test results. (a) Normalized transmission spectra of ITO-LMR sensor under different refractive indices; (b) fitting sensitivity curve

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    Test results of LMR refractive index sensing experiment based on TiO2 nanoparticles assisted enhancement

    Fig. 7. Test results of LMR refractive index sensing experiment based on TiO2 nanoparticles assisted enhancement

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    Relationship between refractive index and resonance wavelength based on TiO2-ITO-LMR sensor. (a) Relationship between refractive index and resonance wavelength in the process of increasing refractive index; (b) sensitivity curve in the process of increasing refractive index; (c) relationship between refractive index and resonance wavelength in the process of decreasing refractive index; (d) sensitivity curve in the process of decreasing refractive index

    Fig. 8. Relationship between refractive index and resonance wavelength based on TiO2-ITO-LMR sensor. (a) Relationship between refractive index and resonance wavelength in the process of increasing refractive index; (b) sensitivity curve in the process of increasing refractive index; (c) relationship between refractive index and resonance wavelength in the process of decreasing refractive index; (d) sensitivity curve in the process of decreasing refractive index

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    • Table 1. Refractive index detection resolution under different refractive indices of the sensor

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      Table 1. Refractive index detection resolution under different refractive indices of the sensor

      Refractive index /RIU

      Resonance

      wavelength /nm

      		Wavelength detection standard deviation /nmSensitivity /（nm·RIU-1）Resolution /（10-4 RIU）
      1.3333744.5250.399496.5378.04
      744.5430.412463.6358.89
      1.3408747.6210.456660.5206.90
      747.6640.453642.7917.05
      1.3484753.3990.459827.2285.55
      753.3700.432824.9235.24
      1.3552761.4200.505976.5025.17
      761.3670.521988.0085.27
      1.3606766.5780.7061095.2686.45
      766.7460.7191117.7626.43
      1.3696775.4350.8691292.4846.72
      775.4300.7671333.2265.75
      1.3741782.8081.0751391.6377.72
      783.1370.8131441.5525.64
      1.3798788.8081.1751516.9407.75
      788.8520.9821577.2586.23
      1.3829796.7621.0351583.9496.53
      797.7840.6711651.6594.06
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    Xiaoshuang Dai, Shuang Wang, Ke Tan, Tong Huo, Junfeng Jiang, Tiegen Liu. Optical-Fiber Refractive Index Sensor Based on Lossy Mode Resonance Enhanced by TiO2 Nanoparticles[J]. Acta Optica Sinica, 2023, 43(10): 1006003

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Nov. 30, 2022

    Accepted: Jan. 29, 2023

    Published Online: May. 9, 2023

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

    DOI:10.3788/AOS222076

    Topics

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