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Acta Optica Sinica, Volume. 41, Issue 13, 1306002(2021)

High-Temperature Sensor Array Based on Fiber Bragg Gratings Fabricated by Femtosecond Laser Point-by-Point Method

Ziyong Chen1,2, Jun He1,2、*, Xizhen Xu1,2, Jia He1,2, Baijie Xu1,2, Bin Du1,2, Changrui Liao1,2, and Yiping Wang1,2
Author Affiliations
  • 1Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
  • 2Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen, Guangdong 518060, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (15)
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    References (28)
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    Figures & Tables(15)
    Experimental setup for fabricating FBG array based on femtosecond laser point-by-point method

    Fig. 1. Experimental setup for fabricating FBG array based on femtosecond laser point-by-point method

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    Microscope images and spectra of the FBG. (a) Top view; (b) lateral view; (c) transmission spectrum and reflection spectrum

    Fig. 2. Microscope images and spectra of the FBG. (a) Top view; (b) lateral view; (c) transmission spectrum and reflection spectrum

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    Reflection spectrum of the WDM-FBG array

    Fig. 3. Reflection spectrum of the WDM-FBG array

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    Reflection spectra of different FBG. (a) FBG T1 and FBG T2; (b) FBG T3 and FBG T4

    Fig. 4. Reflection spectra of different FBG. (a) FBG T1 and FBG T2; (b) FBG T3 and FBG T4

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    Experimental setup of FBG annealing and calibration system

    Fig. 5. Experimental setup of FBG annealing and calibration system

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    FBG center wavelength change curve with time during annealing process. (a) FBG T1 and FBG T3; (b) FBG T2 and FBG T4

    Fig. 6. FBG center wavelength change curve with time during annealing process. (a) FBG T1 and FBG T3; (b) FBG T2 and FBG T4

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    Calculated deviations of different fit functions. (a) Linear function; (b) second-order polynomial function; (c) third-order polynomial function

    Fig. 7. Calculated deviations of different fit functions. (a) Linear function; (b) second-order polynomial function; (c) third-order polynomial function

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    Wavelength-temperature calibration points and temperature response fitting curves of FBG T1 and FBG T2

    Fig. 8. Wavelength-temperature calibration points and temperature response fitting curves of FBG T1 and FBG T2

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    Fitting errors of FBG T1 and FBG T2

    Fig. 9. Fitting errors of FBG T1 and FBG T2

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    Fitting curves of the wavelength variation and temperature of 4 grating samples

    Fig. 10. Fitting curves of the wavelength variation and temperature of 4 grating samples

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    Universal fitting function errors of 4 grating samples

    Fig. 11. Universal fitting function errors of 4 grating samples

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    Universal fitting function error of 4 grating samples improved based on piecewise fitting method

    Fig. 12. Universal fitting function error of 4 grating samples improved based on piecewise fitting method

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    Temperature measurement errors of FBG S1-FBG S4 after improvement

    Fig. 13. Temperature measurement errors of FBG S1-FBG S4 after improvement

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    • Table 1. Preparation parameters of different FBG

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      Table 1. Preparation parameters of different FBG

      SampleTranslation speed/(mm·s-1)Period/μmPulse power/nJ
      FBG 11.04711.0471120
      FBG 21.05261.0526120
      FBG 31.05811.0581120
      FBG 41.06361.0636120
      FBG 51.06921.0692120
      FBG 61.07471.0747120
      FBG 71.08021.0802120
      FBG 81.08581.0858120
      FBG 91.09131.0913120

    • Table 2. Drift rate of the FBG center wavelength during annealing

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      Table 2. Drift rate of the FBG center wavelength during annealing

      Time/h0-5051-100101-150151-195
      FBG T1/(pm·h-1)-11.09-4.93-1.59-0.85
      FBG T2/(pm·h-1)-13.58-3.54-1.06-0.66
      FBG T3/(pm·h-1)-9.42-4.27-1.94-1.14
      FBG T4/(pm·h-1)-15.57-2.58-0.88-0.61
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    Ziyong Chen, Jun He, Xizhen Xu, Jia He, Baijie Xu, Bin Du, Changrui Liao, Yiping Wang. High-Temperature Sensor Array Based on Fiber Bragg Gratings Fabricated by Femtosecond Laser Point-by-Point Method[J]. Acta Optica Sinica, 2021, 41(13): 1306002

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Mar. 1, 2021

    Accepted: May. 19, 2021

    Published Online: Jul. 11, 2021

    The Author Email: He Jun (hejun07@szu.edu.cn)

    DOI:10.3788/AOS202141.1306002

    Topics

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