Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels

Tobias A. Eriksson, Takuya Hirano, Benjamin J. Puttnam, Georg Rademacher, Ruben S. Luís, Mikio Fujiwara, Ryo Namiki, Yoshinari Awaji, Masahiro Takeoka, Naoya Wada, Masahide Sasaki

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

Quantum key distribution (QKD) can offer communication with unconditional security and is a promising technology to protect next generation communication systems. For QKD to see commercial success, several key challenges have to be solved, such as integrating QKD signals into existing fiber optical networks. In this paper, we present experimental verification of QKD co-propagating with a large number of wavelength division multiplexing (WDM) coherent data channels. We show successful secret key generation over 24 h for a continuous-variable QKD channel jointly transmitted with 100 WDM channels of erbium doped fiber amplified polarization multiplexed 16-ary quadrature amplitude modulation signals amounting to a datarate of 18.3 Tbit/s. Compared to previous co-propagation results in the C-band, we demonstrate more than a factor of 10 increase in the number of WDM channels and more than 90 times higher classical bitrate, showing the co-propagation with Tbit/s data-carrying channels.

Original languageEnglish
Article number9
JournalCommunications Physics
Volume2
Issue number1
DOIs
Publication statusPublished - 2019 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels'. Together they form a unique fingerprint.

Cite this