Wavelength Division Multiplexing of 194 Continuous Variable Quantum Key Distribution Channels

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 aggreg...

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Bibliographic Details
Published in:Journal of lightwave technology 2020-04, Vol.38 (8), p.2214-2218
Main Authors: Eriksson, Tobias A., Luis, Ruben S., Puttnam, Benjamin J., Rademacher, Georg, Fujiwara, Mikio, Awaji, Yoshinari, Furukawa, Hideaki, Wada, Naoya, Takeoka, Masahiro, Sasaki, Masahide
Format: Article
Language:English
Subjects:
Channels
Continuity (mathematics)
Digital signal processing
Equalizers
Optical attenuators
Optical polarization
Optical transmitters
Quantum cryptography
Quantum key distribution
Receivers
Wave division multiplexing
Wavelength division multiplexing
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Summary: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.
ISSN:0733-8724
1558-2213
1558-2213
DOI:10.1109/JLT.2020.2970179