Affiliation:
1. Sun Yat-sen University
2. Yangtze Optical Fiber and Cable Joint Stock Limited Company
Abstract
A successful transmission of 14 multiplexed orbital angular momentum (OAM) channels each carrying 80 wavelengths over a 100-km single-span ring-core fiber (RCF) is experimentally demonstrated. Each transmission channel is modulated by a 20-GBaud quadrature phase-shift keying (QPSK) signal, achieving a record spectral-efficiency-distance product of 1870 (bit/s/Hz)·km for the single-core RCF based mode division multiplexing (MDM) transmissions. In addition, only low-complexity 2×2 or 4×4 multiple-input multiple-output (MIMO) equalization with time-domain equalization tap number no more than 25 is required to deal with the crosstalk among the highly degenerate intra-MG modes at the receiving end of the demonstrated OAM-MDM-WDM system, showing great potential in large-capacity and relatively long-distance MDM transmission with low digital signal processing (DSP) complexity.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China-Guangdong Joint Fund
National Natural Science Foundation of China
The Key Research and Development Program of Guangdong Province
Guangdong Provincial Pearl River Talents Program
Subject
Atomic and Molecular Physics, and Optics
Cited by
13 articles.
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