Abstract
In this paper, we report our recent experiment of long-distance fiber-optic “plug and play” quantum cryptography system wherein a Faraday-Mirror was used to compensate for the polarization mode dispersion and phase drifts. The pulse-biased conincident gate single-photon detection technique was used to effectively reduce the noises from the detrimental Rayleigh backscattering. We have achieved a quantum key distribution system with the working distance of 50 km, which was tested to be stable in more than 6 hours' continuous work. And we also demonstrated the practical quantum communication in a local area network using the TCP protocol.
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Zhou, C., Wu, G., Chen, X. et al. Quantum key distribution in 50-km optic fibers. Sci China Ser G: Phy & Ast 47, 182–188 (2004). https://doi.org/10.1360/03yw0094
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DOI: https://doi.org/10.1360/03yw0094