Journal
OPTICS EXPRESS
Volume 17, Issue 26, Pages 24244-24249Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.024244
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- Agence Nationale de la Recherche
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We report a continuous variable key distribution system that achieves a final secure key rate of 3.45 kilobits/s over a distance of 24.2 km of optical fiber. The protocol uses discrete signaling and post-selection to improve reconciliation speed and quantifies security by means of quantum state tomography. Polarization multiplexing and a frequency translation scheme permit transmission of a continuous wave local oscillator and suppression of noise from guided acoustic wave Brillouin scattering by more than 27 dB. (C) 2009 Optical Society of America
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