Pilot-assisted intradyne reception for high-speed continuous-variable quantum key distribution with true local oscillator

We present a pilot-assisted coherent intradyne reception methodology for CV-QKD with true local oscillator. An optically phase-locked reference tone, prepared using carrier-suppressed optical single-sideband modulation, is multiplexed in polarisation and frequency to the 250 Mbaud quantum signal in...

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Bibliographic Details
Published in:arXiv.org 2019-10
Main Authors: Laudenbach, Fabian, Schrenk, Bernhard, Pacher, Christoph, Hentschel, Michael, Chi-Hang, Fred Fung, Karinou, Fotini, Poppe, Andreas, Peev, Momtchil, Hübel, Hannes
Format: Article
Language:English
Subjects:
Continuity (mathematics)
Optical frequency
Phase matching
Quantum cryptography
Single sideband transmission
Online Access:Get full text
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Summary:We present a pilot-assisted coherent intradyne reception methodology for CV-QKD with true local oscillator. An optically phase-locked reference tone, prepared using carrier-suppressed optical single-sideband modulation, is multiplexed in polarisation and frequency to the 250 Mbaud quantum signal in order to provide optical frequency- and phase matching between quantum signal and local oscillator. Our concept allows for high symbol rates and can be operated at an extremely low excess-noise level, as validated by experimental measurements.
ISSN:2331-8422
DOI:10.48550/arxiv.1712.10242