Mode Division Multiplexing Based on Ring Core Optical Fibres

Liu, Jie, Zhu, Guoxuan, Zhang, Junwei, Wen, Yuanhui, Wu, Xiong, Zhang, Yanfeng, Chen, Yujie, Cai, Xinlun, Li, Zhaohui, Hu, Ziyang, Zhu, Jiangbo, Yu, Siyuan and Yu, Siyuan (2018) Mode Division Multiplexing Based on Ring Core Optical Fibres. IEEE Journal of Quantum Electronics, 54 (5). 0700118. ISSN 0018-9197

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Abstract

The unique modal characteristics of ring core fibers (RCFs) potentially enable the implementation of mode-division multiplexing (MDM) schemes that can increase optical data transmission capacity with either low-complexity modular multi-input multi-output (MIMO) equalization or no MIMO equalization. This paper attempts to present a comprehensive review of recent research on the key aspects of RCF-based MDM transmission. Starting from fundamental fiber modal structures, a theoretical comparison between RCFs and conventional step-index and graded-index multi-mode fibers in terms of their MDM capacity and the associated MIMO complexity is given first as the underlining rationale behind RCF-MDM. This is followed by a discussion of RCF design considerations for achieving high-mode channel count and low crosstalk performances in either MIMO-free or modular MIMO transmission schemes. The principles and implementations of RCF mode (de-)multiplexing devices are discussed in detail, followed by RCF-based optical amplifiers culminating in MIMO-free or modular-MIMO RCF-MDM data transmission schemes. A discussion on further research directions is also given.

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