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  • Received: Nov. 13, 2019

    Accepted: Dec. 26, 2019

    Posted: Apr. 14, 2020

    Published Online: Apr. 15, 2020

    The Author Email: Guifang Li (

    DOI: 10.3788/COL202018.040601

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    Huiyuan Liu, He Wen, Guifang Li. Applications of weakly-coupled few-mode fibers [Invited][J]. Chinese Optics Letters, 2020, 18(4): 040601

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Chinese Optics Letters, Vol. 18, Issue 4, 040601 (2020)

Applications of weakly-coupled few-mode fibers [Invited] 

Huiyuan Liu, He Wen, and Guifang Li*

Author Affiliations

  • CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, FL 32816, USA


Space-division multiplexing (SDM) has attracted significant attention in recent years because larger transmission capacity is enabled by more degrees of freedom (DOFs) in few-mode fibers (FMFs) compared with single-mode fibers (SMFs). To transmit independent information on spatial modes without or with minor digital signal processing (DSP), weakly-coupled FMFs are preferred in various applications. Several cases with different use of spatial DOFs in weakly-coupled FMFs are demonstrated in this work, including single-mode or mode-group-multiplexed transmission, and spatial DOFs combined with time or frequency DOF to improve the system performance.


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