期刊
OPTICS EXPRESS
卷 28, 期 13, 页码 19655-19668出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.395415
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资金
- Ministry of Internal Affairs and Communications [JPMI00316, 171507001]
- National Institute of Information and Communications Technology
- Japan Society for the Promotion of Science (KAKENHI) [18H03231]
- Grants-in-Aid for Scientific Research [18H03231] Funding Source: KAKEN
For weakly coupled mode-division multiplexed (MDM) transmission systems, we design and implement optical coherent receiver prototypes with real-time multiple-input multiple-output (MIMO) digital signal processing to equalize two degenerate linearly polarized modes with dual polarization. Using field programmable gate array circuits, we implement real-value 8 x 2 MIMO adaptive equalization with externally separated phase compensators based on the least mean square algorithm, which enables not only training equalization but also fast carrier-phase tracking. With the optical coherent MIMO receiver prototype, we demonstrate real-time weakly coupled 10 x MDM wavelength-division multiplexed dual-polarization quadrature phase shift keying transmission over 48-km few-mode fibers. This report shows a record number of multiplexed spatial modes, namely, 10 modes with dual polarization, in real-time MDM transmission experiments. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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