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Acta Optica Sinica, Volume. 39, Issue 3, 0306001(2019)

Curvature Sensing Measurement Based on Seven-Core Fiber and Few-Mode Fiber Splicing Structure

Xining Xu1,3 and Yongjun Chen2、*
Author Affiliations
  • 1 School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
  • 2 School of Economics and Management Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
  • 3 Key Laboratory of Vehicle Advanced Manufacturing, Measuring and Control Technology, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    Figures & Tables(12)
    Structural diagram of curvature sensor

    Fig. 1. Structural diagram of curvature sensor

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    Microscope images of cross section. (a) FMF; (b) SCF

    Fig. 2. Microscope images of cross section. (a) FMF; (b) SCF

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    Structural diagrams and microscope images of different sensing heads.(a) Straight type;(b) same direction mismatch type;(c) different direction mismatch type; (d) microscope image of straight type; (e) microscope image of mismatch type

    Fig. 3. Structural diagrams and microscope images of different sensing heads.(a) Straight type;(b) same direction mismatch type;(c) different direction mismatch type; (d) microscope image of straight type; (e) microscope image of mismatch type

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    Test results of sensor A. (a) Optical spectrum; (b) frequency spectrum

    Fig. 4. Test results of sensor A. (a) Optical spectrum; (b) frequency spectrum

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    Test results of sensor B. (a) Optical spectrum; (b) frequency spectrum

    Fig. 5. Test results of sensor B. (a) Optical spectrum; (b) frequency spectrum

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    Test results of sensor C. (a) Optical spectrum; (b) frequency spectrum

    Fig. 6. Test results of sensor C. (a) Optical spectrum; (b) frequency spectrum

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    Schematic of experimental setup

    Fig. 7. Schematic of experimental setup

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    Experimental results of sensor A. (a) Spectrum versus curvature; (b) data fitting results

    Fig. 8. Experimental results of sensor A. (a) Spectrum versus curvature; (b) data fitting results

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    Experimental results of sensor B. (a) Spectrum versus curvature; (b) data fitting results

    Fig. 9. Experimental results of sensor B. (a) Spectrum versus curvature; (b) data fitting results

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    Experimental results of sensor C. (a) Spectrum versus curvature; (b) data fitting results

    Fig. 10. Experimental results of sensor C. (a) Spectrum versus curvature; (b) data fitting results

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    • Table 1. Sensing sensitivity comparison among different splicing methods

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      Table 1. Sensing sensitivity comparison among different splicing methods

      SensortypeWavelength sensitivity /(nm·m-1)Intensity sensitivity /(dB·m-1)
      Sensor A6.338.57
      Sensor B30.8325.65
      Sensor C15.961.96

    • Table 2. Sensor sensitivity comparison for different sensing structures

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      Table 2. Sensor sensitivity comparison for different sensing structures

      StructureWavelength sensitivity /(nm·m-1)Intensity sensitivity /(dB·m-1)
      Mach-Zehnder interferometer based on PCF[13]3.046-
      Seven-core PCF[14]1.232-
      Polarization-maintaining PCF[15]93.950-
      PCF based on core-offset splicing and fiber taper[16]13.620-
      Proposed method30.83025.65
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    Xining Xu, Yongjun Chen. Curvature Sensing Measurement Based on Seven-Core Fiber and Few-Mode Fiber Splicing Structure[J]. Acta Optica Sinica, 2019, 39(3): 0306001

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Jul. 16, 2018

    Accepted: Oct. 21, 2018

    Published Online: May. 10, 2019

    The Author Email:

    DOI:10.3788/AOS201939.0306001

    Topics

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