Wavelength Division Multiplexing of 194 Continuous Variable Quantum Key Distribution Channels
Tobias A. Eriksson, Ruben Soares Luis, Benjamin James Puttnam, Georg Rademacher, Mikio Fujiwara, Yoshinari Awaji, Hideaki Furukawa, Naoya Wada, Masahiro Takeoka, Masahide Sasaki · Journal of Lightwave Technology · 2020
We demonstrate the first continuous variable quantum key distribution (CV-QKD) system with fully digital phase and polarization tracking, enabling the first wavelength division multiplexing experiment for CV-QKD. We transmit 194 × 0.5 GHz channels with 25 GHz channel spacing, demonstrating an aggregate estimated asymptotic secret key rate of 172.6 Mbit/s over 25 km.