Journal
OPTICS EXPRESS
Volume 26, Issue 4, Pages 4243-4257Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.004243
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Funding
- National Basic Research Program of China (973 Program) [2014CB340000]
- National Natural Science Foundations of China [61490715, 61505266, 61323001, 11690031, 51403244]
- Guangdong Natural Science Foundation [2014A030310364, 2016A030313289]
- Science and Technology Program of Guangzhou [201707020017]
- European Union Horizon project ROAM
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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 OAMMGM scheme. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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