Pilot-assisted intradyne reception for high-speed continuous-variable quantum key distribution with true local oscillator
arXiv:1712.10242 · doi:10.22331/q-2019-10-07-193
Abstract
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.
12 pages, 6 figures, 1 table
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- Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication
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