Pilot-assisted intradyne reception for high-speed continuous-variable quantum key distribution with true local oscillator
2019; Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften; Volume: 3; Linguagem: Inglês
10.22331/q-2019-10-07-193
ISSN2521-327X
AutoresFabian Laudenbach, Bernhard Schrenk, Christoph Pacher, Michael Hentschel, Chi‐Hang Fred Fung, Fotini Karinou, Andreas Poppe, Momtchil Peev, Hannes Hübel,
Tópico(s)Advanced Fiber Laser Technologies
ResumoWe 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.
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