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