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Acta Optica Sinica, Volume. 44, Issue 20, 2014005(2024)

Modified Spatially and Spectrally Resolved Analysis of Mode Coupling Characteristics at the Splicing Point of Few-Mode Fibers

Xiao Chen1, Shanmin Huang1, Liangjin Huang1,2,3、*, Zhiping Yan1,2,3, Zhiyong Pan1,2,3, Zongfu Jiang1,2,3, and Pu Zhou1
Author Affiliations
  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, Hunan , China
  • 2Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, Hunan , China
  • 3Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, Hunan , China
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    Figures & Tables(9)
    Schematic diagrams of the mode coupling characteristics for the fusion splicing of different types of fiber. (a) Splicing of single-mode fiber and few-mode fiber; (b) splicing of few-mode fibers

    Fig. 1. Schematic diagrams of the mode coupling characteristics for the fusion splicing of different types of fiber. (a) Splicing of single-mode fiber and few-mode fiber; (b) splicing of few-mode fibers

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    Temporal characteristic at the output end of the two-mode fiber link when considering the mode coupling at the splicing point

    Fig. 2. Temporal characteristic at the output end of the two-mode fiber link when considering the mode coupling at the splicing point

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    Theoretical results for analyzing the mode coupling at the splicing point based on the modified spatially and spectrally resolved imaging method. (a) Spatially and spectrally resolved imaging results when without and with the mode coupling at the splicing point; (b) results for analyzing the mode coupling under different LP11 mode ratios R; (c) phase and amplitude reconstruction results of the two LP11 components

    Fig. 3. Theoretical results for analyzing the mode coupling at the splicing point based on the modified spatially and spectrally resolved imaging method. (a) Spatially and spectrally resolved imaging results when without and with the mode coupling at the splicing point; (b) results for analyzing the mode coupling under different LP11 mode ratios R; (c) phase and amplitude reconstruction results of the two LP11 components

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    Experimental setup for the mode coupling analysis at the fiber splicing point

    Fig. 4. Experimental setup for the mode coupling analysis at the fiber splicing point

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    Mode coupling analysis for the splicing of optical fibers with identical cladding diameters. (a) Representative result with the arc duration time of 1000 ms; (b) representative result with the arc duration time of 4000 ms; (c) representative result with the arc duration time of 6000 ms; (d) repeated tests for the splicing induced mode coupling with different arc duration time

    Fig. 5. Mode coupling analysis for the splicing of optical fibers with identical cladding diameters. (a) Representative result with the arc duration time of 1000 ms; (b) representative result with the arc duration time of 4000 ms; (c) representative result with the arc duration time of 6000 ms; (d) repeated tests for the splicing induced mode coupling with different arc duration time

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    Mode coupling analysis for the splicing of 125 μm fiber and 250 μm fiber. (a) Representative result for the splicing with the reference arc power; (b) influences of the relative arc power and the cleaving angle on the mode coupling at the splicing point

    Fig. 6. Mode coupling analysis for the splicing of 125 μm fiber and 250 μm fiber. (a) Representative result for the splicing with the reference arc power; (b) influences of the relative arc power and the cleaving angle on the mode coupling at the splicing point

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    Mode coupling analysis for the splicing of 125 μm fiber and 400 μm fiber. (a) Representative results of mode coupling analysis; (b) influence of the cleaving angle on the mode coupling at the splicing point; (c) influence of the relative arc power on the mode coupling at the splicing point

    Fig. 7. Mode coupling analysis for the splicing of 125 μm fiber and 400 μm fiber. (a) Representative results of mode coupling analysis; (b) influence of the cleaving angle on the mode coupling at the splicing point; (c) influence of the relative arc power on the mode coupling at the splicing point

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    Mode coupling analysis for the splicing few-mode fibers. (a) Representative results of mode coupling analysis; (b) influence of the relative arc power on the mode coupling at the splicing point; (c) influence of the arc duration time on the mode coupling at the splicing point

    Fig. 8. Mode coupling analysis for the splicing few-mode fibers. (a) Representative results of mode coupling analysis; (b) influence of the relative arc power on the mode coupling at the splicing point; (c) influence of the arc duration time on the mode coupling at the splicing point

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    • Table 1. Analysis results of mode coupling at the splicing point by using the modified spatially and spectrally resolved imaging method under different mode content ratios

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      Table 1. Analysis results of mode coupling at the splicing point by using the modified spatially and spectrally resolved imaging method under different mode content ratios

      ExampleMode componentRelative contents /%Theoretical MPI /dBTested MPI /dB
      Equal ratios for E2and E4E199.0——
      E20.5-23.0-24.8
      E40.5-23.0-24.8
      Different ratios for E2 and E4E199.0——
      E20.8-20.9-22.8
      E40.2-27.0-28.7
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    Xiao Chen, Shanmin Huang, Liangjin Huang, Zhiping Yan, Zhiyong Pan, Zongfu Jiang, Pu Zhou. Modified Spatially and Spectrally Resolved Analysis of Mode Coupling Characteristics at the Splicing Point of Few-Mode Fibers[J]. Acta Optica Sinica, 2024, 44(20): 2014005

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Apr. 10, 2024

    Accepted: Jun. 13, 2024

    Published Online: Oct. 11, 2024

    The Author Email: Huang Liangjin (hlj203@nudt.edu.cn)

    DOI:10.3788/AOS240829

    CSTR:32393.14.AOS240829

    Topics

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