Weakly coupled 10-mode-division multiplexed transmission over 48-km few-mode fibers with real-time coherent MIMO receivers

Weakly coupled 10-mode-division multiplexed transmission over 48-km few-mode fibers with real-time coherent MIMO receivers

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...

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Veröffentlicht in:Optics express 2020-06, Vol.28 (13), p.19655-19668
Hauptverfasser: Beppu, Shohei, Igarashi, Koji, Kikuta, Masahiro, Soma, Daiki, Nagai, Tomoyuki, Saito, Yasuo, Takahashi, Hidenori, Tsuritani, Takehiro, Morita, Itsuro, Suzuki, Masatoshi
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container_end_page 19668
container_issue 13
container_start_page 19655
container_title Optics express
container_volume 28
creator Beppu, Shohei
Igarashi, Koji
Kikuta, Masahiro
Soma, Daiki
Nagai, Tomoyuki
Saito, Yasuo
Takahashi, Hidenori
Tsuritani, Takehiro
Morita, Itsuro
Suzuki, Masatoshi
description 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 × 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 × 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.
doi_str_mv 10.1364/OE.395415
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title Weakly coupled 10-mode-division multiplexed transmission over 48-km few-mode fibers with real-time coherent MIMO receivers
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