Orbital-angular-momentum mode-group multiplexed transmission over a graded-index ring-core fiber based on receive diversity and maximal ratio combining

Junwei Zhang, Guoxuan Zhu, Jie Liu, Xiong Wu, Jiangbo Zhu, Cheng Du, Wenyong Luo, Yujie Chen, Siyuan Yu

Research output: Contribution to journalArticle (Academic Journal)peer-review

32 Citations (Scopus)
341 Downloads (Pure)

Abstract

An orbital-angular-momentum (OAM) mode-group multiplexing (MGM) scheme using high-order mode groups (MGs) in a graded-index ring-core fiber (GIRCF) is proposed, in which a receive-diversity architecture is designed for each MG to suppress the mode partition noise resulting from random intra-group mode crosstalk. The signal-to-noise ratio (SNR) of the received signals is further improved by a simple maximal ratio combining (MRC) technique on the receiver side to efficiently take advantage of the diversity gain of the receiver. Intensity-modulated direct-detection (IM-DD) systems transmitting three OAM mode groups with total 100-Gb/s discrete multi-tone (DMT) signals over a 1-km GIRCF and two OAM mode groups with total 40-Gb/s DMT signals over an 18.4-km GIRCF are experimentally demonstrated, respectively, to confirm the feasibility of our proposed OAM-MGM scheme.
Original languageEnglish
Pages (from-to)4243-4257
Number of pages15
JournalOptics Express
Volume26
Issue number4
Early online date8 Feb 2018
DOIs
Publication statusPublished - 19 Feb 2018

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