4.4 Article

Mode Division Multiplexing Based on Ring Core Optical Fibers

Journal

IEEE JOURNAL OF QUANTUM ELECTRONICS
Volume 54, Issue 5, Pages -

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2018.2864561

Keywords

Ring-core fiber; mode-division multiplexing; optical communications

Funding

  1. Natural Science Foundation of China (NSFC) through the Major Research Project [61490715]
  2. NSFC-Guangdong Joint Program [U1701661]
  3. Local Innovative and Research Team Project of the Guangdong Pearl River Talents Program [2017BT01X121]
  4. Chinese Ministry of Science and Technology through the 973 Project [2014CB340000]
  5. EU H2020 under Grant ROAM

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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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