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Conference 12028 > Paper 12028-3
Paper 12028-3

Demonstration of real-time space division multiplexed transmission using coupled-core fibers with real-time MIMO DSP


Real-time MIMO DSP is challenging but essential for practical deployment of coupled-core multicore fiber transmission systems as well as mode-division multiplexed transmission systems. We implemented a real-time MIMO DSP which can equalize four spatially-coupled signals (or four spatial modes) with dual polarizations by utilizing FPGA boards. With the real-time MIMO DSP, we show an experimental demonstration of real-time transoceanic transmission over coupled-core multicore fibers. The WDM DP-QPSK signals were transmitted over 7,200-km coupled-core four-core fibers and demodulated by real-time MIMO DSP. We also show the first real-time QAM transmission over coupled-core four-core fibers.


KDDI Research, Inc. (Japan)
Shohei Beppu received B.E. and M.E. degrees in communication engineering from Tohoku University, Miyagi, Japan, in 2013 and 2015, respectively. He joined KDDI Corporation, Tokyo, Japan, in 2015. Since 2016, he has been working with KDDI R&D Laboratories, Inc. (currently KDDI Research, Inc.), Saitama, Japan. His current research interests include signal processing for coherent optical communication systems and space-division-multiplexed optical transmission systems. Mr. Beppu was a recipient of Outstanding Student Paper Competition Honorable Mention in OFC 2014, and the Young Researcher’s Award of IEICE in 2014.
KDDI Research, Inc. (Japan)
KDDI Research, Inc. (Japan)