Ultra-large mode area multi-core orbital angular momentum transmission fiber designed by neural network and optimization algorithms
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1. Key Laboratory of Computer Vision and Systems (Ministry of Education), School of Computer Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;2. Engineering Research Center of Learning-Based Intelligent System (Ministry of Education), Tianjin University of Technology, Tianjin 300384, China

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    Abstract:

    A large mode area multi-core orbital angular momentum (OAM) transmission fiber is designed and optimized by neural network and optimization algorithms. The neural network model has been established first to predict the optical properties of multi-core OAM transmission fibers with high accuracy and speed, including mode area, nonlinear coefficient, purity, dispersion, and effective index difference. Then the trained neural network model is combined with different particle swarm optimization (PSO) algorithms for automatic iterative optimization of multi-core structures respectively. Due to the structural advantages of multi-core fiber and the automatic optimization process, we designed a number of multi-core structures with high OAM mode purity (>95%) and ultra-large mode area (>3 000 μm2), which is larger by more than an order of magnitude compared to the conventional ring-core OAM transmission fibers.

    Reference
    [1] MA Q C, LUO A P, HONG W Y. Numerical study of photonic crystal fiber supporting 180 orbital angular momentum modes with high mode quality and flat dispersion[J]. Journal of lightwave technology, 2021, 39(9):2971-2979.
    [2] WANG Q B, ZHANG X D, LIU X J, et al. Orbital angular momentum modes (de)multiplexer without mode conversion based on strongly guiding coupled ring-core fibers[J]. Journal of lightwave technology, 2022, 40(19):6523-6533.
    [3] FENG F, GAN J A, NONG J P, et al. Data transmission with up to 100 orbital angular momentum modes via commercial multi-mode fiber and parallel neural networks[J]. Optics express, 2022, 30(13):23149-23162.
    [4] TANDJè A, YAMMINE J, DOSSOU M, et al. Ring-core photonic crystal fiber for propagation of OAM modes[J]. Optics letters, 2019, 44(7):1611-1614.
    [5] QIN H B, HUANG W, SONG B B, et al. Hybrid method for inverse design of orbital angular momentum transmission
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GU Zhiwei, HUANG Wei, ZHANG Ran, FAN Junjie, SONG Binbin. Ultra-large mode area multi-core orbital angular momentum transmission fiber designed by neural network and optimization algorithms[J]. Optoelectronics Letters,2023,19(12):744-751

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History
  • Received:March 13,2023
  • Revised:May 12,2023
  • Online: December 08,2023
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