First Demonstration of 25λ × 10 Gb/s C+L Band Classical / DV-QKD Co-Existence Over Single Bidirectional Fiber Link
- Author(s)
- Florian Honz, Florian Prawits, Obada Alia, Hesham Sakr, Thomas Bradley, Cong Zhang, Radan Slavik, Francesco Poletti, George Kanellos, Reza Nejabati, Philip Walther, Dimitra Simeonidou, Hannes Hübel, Bernhard Schrenk
- Abstract
As quantum key distribution has reached the maturity level for practical deployment, questions about the co-integration with existing classical communication systems are of utmost importance. To this end we demonstrate how the co-propagation of classical and quantum signals can benefit from the development of novel hollow-core fibers. We demonstrate a secure key rate of 330 bit/s for a quantum channel at 1538 nm in the presence of 25 × 10 Gb/s classical channels, transmitted at an aggregated launch power of 12 dBm, spanning over the C+L-band in the same hollow-core fiber link. Furthermore, we show the co-integration of the classical key-distillation channel onto this fiber link, turning it into a bidirectional fiber link and thereby mitigating the need for multiple fibers. We believe this to be an important step towards the deployment and integration of hollow-core fibers together with DV-QKD for the inherently secure telecom network of the future.
- Organisation(s)
- Quantum Optics, Quantum Nanophysics and Quantum Information
- External organisation(s)
- University of Bristol, University of Southampton, Austrian Institute of Technology
- Journal
- Journal of Lightwave Technology
- Volume
- 41
- Pages
- 3587-3593
- No. of pages
- 7
- ISSN
- 0733-8724
- DOI
- https://doi.org/10.1109/JLT.2023.3256352
- Publication date
- 06-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103021 Optics, 103025 Quantum mechanics
- Keywords
- ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/first-demonstration-of-25--10-gbs-cl-band-classical--dvqkd-coexistence-over-single-bidirectional-fiber-link(84efd591-edbd-470c-bdc4-2a6bf50e912a).html