Laser & Optoelectronics Progress, Volume. 62, Issue 17, 1739018(2025)

Perfect Vertical Grating Coupler for Multi-Core Fiber Communication (Invited)

Ye Tian1, Rui Jiang1, Jiaming Zhang1, Shilong Pan1, and Ang Li1,2、*
Author Affiliations
  • 1National Key Laboratory of Microwave Photonics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu , China
  • 2Key Lab of Modern Optical Technologies of Education Ministry of China, Suzhou 215006, Jiangsu , China
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    Figures & Tables(7)
    Schematic diagram of PVGC. (a) Alignment and packaging of the PVGC array and MCF; (b) three-dimensional diagram of the proposed PVGC; (c) cross-sectional view of PVGC
    Opimization of PVGC. (a) Flow chart of optimizing PVGC; (b) FOM evolution process; (c) structural parameters for the optimized PVGC
    Performance simulation analysis of PVGC. (a) Simulated electric field distribution at 1550 nm; (b) transmission spectra; (c) transmission spectra under different fiber tilt angles
    Fabrication robustness analysis. (a) Impact of etching width variations on transmission spectrum; (b) impact of etching depth variations on transmission spectrum
    Experimental setup and results. (a) Measurement setup; (b) microscope image of PVGC; (c) zoom-in view of PVGC; (d) measured transmission spectra under different fiber tilt angles
    PVGC array and performance test results. (a) Physical map of PVGC array (insert: zoom-in view of the reference grating coupler and the PVGC array); (b) measurement results of PVGC array
    • Table 1. Comparison of PVGC performance on 220 nm SOI platform

      View table

      Table 1. Comparison of PVGC performance on 220 nm SOI platform

      ReferenceStructureCoupling efficiency /dBFabrication stepMFS /nm
      SimulationExperiment
      9Binary blazed grating coupler-1.78-3.69157
      15Metagrating coupler-2.2-4.22200
      18Subwavelength metamaterial-1.742130
      This workRandom structure-2.98-3.891200
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    Ye Tian, Rui Jiang, Jiaming Zhang, Shilong Pan, Ang Li. Perfect Vertical Grating Coupler for Multi-Core Fiber Communication (Invited)[J]. Laser & Optoelectronics Progress, 2025, 62(17): 1739018

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    Paper Information

    Category: AI for Optics

    Received: Apr. 7, 2025

    Accepted: May. 26, 2025

    Published Online: Sep. 12, 2025

    The Author Email: Ang Li (ang.li@nuaa.edu.cn)

    DOI:10.3788/LOP250947

    CSTR:32186.14.LOP250947

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