Acta Optica Sinica, Volume. 43, Issue 4, 0406003(2023)

Accurate Mode Decomposition for Ring Core Fibers Based on Deep Learning

Zichen Tian1、aff, Li Pei1、*, Jianshuai Wang1、aff, Bing Bai1、aff, Kaihua Hu1、aff, Jingjing Zheng1、aff, Lei Shen2,3,4、affaffaff, and Wenxuan Xu1、aff
Author Affiliations
  • 1Key Laboratory of All Optical Network and Advanced Telecommunication Network, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
  • 2State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Wuhan 430073, Hubei, China
  • 3Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC), Wuhan 430073, Hubei, China
  • 4Hubei Optics Valley Laboratory, Wuhan 430073, Hubei, China
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    Figures & Tables(8)
    Diagram of FM-RCF characteristics. (a) Refractive index profile; (b) typical mode field profiles of fiber modes; (c) 8-mode (LP01, LP11o, LP11e, LP21o, LP21e, LP31e, LP31o, and LP02) superposition beam patterns in fiber core
    Illustration of proposed CNN architecture
    Loss value of CNN as a function of epochs for two MD methods in 3-mode superposition case
    Comparison of modal coefficient error. (a) Modal weight error; (b) modal relative phase error
    Typical reconstructed spot examples for different mode superposition. (a) 3-mode case; (b) 5-mode case; (c) 7-mode case; (d) 8-mode case
    Experimental setup for recording real beam patterns
    Typical reconstructed examples based on real spot patterns for 3-mode superposition case
    • Table 1. Comparison of multiple CNN-MD methods in 8-mode superposition case

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      Table 1. Comparison of multiple CNN-MD methods in 8-mode superposition case

      MethodFMF RI profileΔρ2 /%Δθ /%One MD time /msPre-training dataset

      Input

      request

      Equipment

      requirement

      VGGStep-index2.203.90~21ImageNetOne NFSingle GPU
      NFFL-CNNStep-index1.102.25~52NoneOne NFSingle GPU
      DH-ResNet18Step-index1.252.01~10None

      One NF

      One PD

      Single GPU
      DenseNet121Step-index1.802.60~6NoneOne NFTwo GPUs
      PFCNNRing-core0.951.929NoneOne NFSingle GPU
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    Zichen Tian, Li Pei, Jianshuai Wang, Bing Bai, Kaihua Hu, Jingjing Zheng, Lei Shen, Wenxuan Xu. Accurate Mode Decomposition for Ring Core Fibers Based on Deep Learning[J]. Acta Optica Sinica, 2023, 43(4): 0406003

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Aug. 2, 2022

    Accepted: Sep. 19, 2022

    Published Online: Feb. 16, 2023

    The Author Email: Pei Li (lipei@bjtu.edu.cn)

    DOI:10.3788/AOS221559

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