Record-High Secret Key Rate for Joint Classical and Quantum Transmission Over a 37-Core Fiber
Beatrice Da Lio, Davide Bacco, Daniele Cozzolino, Francesco Da Ros, Xueshi Guo, Yunhong Ding, Y. Sasaki, Kazuhiko Aikawa, Shigehito Miki, Hirotaka Terai, Taro Yamashita, Jonas Schou Neergaard-Nielsen, Michael Galili, Karsten K. Rottwitt, Ulrik L. Andersen, Leif Katsuo Oxenløwe, Toshio Morioka · 2018
We overcome the low secret key rates of current quantum communication systems using space division multiplexing in a heterogeneous 37-core fiber. We demonstrate record-high rates of 107 Mb/s for the quantum channel alone and of 65 Mb/s when co-propagating with 370 Gb/s classical data.