• Acta Optica Sinica
  • Vol. 42, Issue 7, 0706008 (2022)
Zhikang Zhuang1、2, Yuangang Lu1、2、*, Jianqin Peng1、2, and Chongjun He1、2
Author Affiliations
  • 1Key Laboratory of Space Photoelectric Detection and Perception of Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, China
  • 2College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, China
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    DOI: 10.3788/AOS202242.0706008 Cite this Article Set citation alerts
    Zhikang Zhuang, Yuangang Lu, Jianqin Peng, Chongjun He. Fiber-Optic Macrobending-Based Temperature Sensor with Polyimide Coating[J]. Acta Optica Sinica, 2022, 42(7): 0706008 Copy Citation Text show less
    Schematic of bending state of fiber-optic with coating
    Fig. 1. Schematic of bending state of fiber-optic with coating
    Curves of fiber-optic bending loss with bending radius at different temperatures
    Fig. 2. Curves of fiber-optic bending loss with bending radius at different temperatures
    Local magnification of three loss peaks in Fig. 2. (a) Bending radius is 7.7 mm; (b) bending radius is 9.1 mm; (c) bending radius is 10.9 mm
    Fig. 3. Local magnification of three loss peaks in Fig. 2. (a) Bending radius is 7.7 mm; (b) bending radius is 9.1 mm; (c) bending radius is 10.9 mm
    Curves of fiber bending loss with temperature at different bending radii
    Fig. 4. Curves of fiber bending loss with temperature at different bending radii
    Curve fitting results of loss with temperature at 9.15 mm bending radius. (a) Linear fitting and polynomial fitting curves; (b) fitting residuals of two fitting methods
    Fig. 5. Curve fitting results of loss with temperature at 9.15 mm bending radius. (a) Linear fitting and polynomial fitting curves; (b) fitting residuals of two fitting methods
    Preparation process of fiber-optic temperature sensor
    Fig. 6. Preparation process of fiber-optic temperature sensor
    1060-XP fiber-optic sensor with polyimide coating
    Fig. 7. 1060-XP fiber-optic sensor with polyimide coating
    Schematic of fiber-optic macrobending temperature sensor
    Fig. 8. Schematic of fiber-optic macrobending temperature sensor
    Curve of fiber-optic macrobending loss with temperature at 9.15 mm bending radius. (a) Temperature range is -20--100 ℃; (b) temperature range is 0--80 ℃
    Fig. 9. Curve of fiber-optic macrobending loss with temperature at 9.15 mm bending radius. (a) Temperature range is -20--100 ℃; (b) temperature range is 0--80 ℃
    Stability test results of sensor at 9.15 mm bending radius and 90 ℃ temperature
    Fig. 10. Stability test results of sensor at 9.15 mm bending radius and 90 ℃ temperature
    ParameterCoreCladdingCoating(PI)
    Radius/μm2.962.5100.0
    Refractive index1.463131.456421.62000
    TEC/-1[25]5.5×10-75.5×10-7
    TOC/℃-1 [25]1.1×10-51.0×10-5~4.0×10-4
    Table 1. Parameters of 1060-XP optical fiber
    Fiber optionRange /℃Sensitivity /(dB·℃-1)Resolution /℃Linear regression coefficient
    SMF:1060-XP[6]0--75.00.01200<1.00
    SMF:1060-XP[7]0--80.00.023000.50>0.997
    Multimode POF[10]27.2--50.20.012900.30>0.990
    Multimode POF[12]25.0--67.00.003820.995
    SMF:1060-XP(this paper)-20.0--100.00.072000.14>0.999(0--80 ℃),>0.997(-20--100 ℃)
    Table 2. Comparison of parameters of different fiber-optic macro-bend temperature sensors
    Zhikang Zhuang, Yuangang Lu, Jianqin Peng, Chongjun He. Fiber-Optic Macrobending-Based Temperature Sensor with Polyimide Coating[J]. Acta Optica Sinica, 2022, 42(7): 0706008
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