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Optica Publishing Group
  • Optical Fiber Communication Conference and International Conference on Quantum Information
  • 2001 OSA Technical Digest Series (Optica Publishing Group, 2001),
  • paper PA3
  • https://doi.org/10.1364/ICQI.2001.PA3

Single-Photon Superconducting Detectors for Practical High-Speed Quantum Cryptography

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Abstract

We have developed an ultrafast superconducting single-photon detector with negligible dark counting rate. The detector is based on an ultrathin, submicron-wide NbN meander-type stripe and can detect individual photons in the visible to near-infrared wavelength range at a rate of at least 10 Gb/s. The above counting rate allows us to implement the NbN device to unconditionally secret quantum key distribution in a practical, high-speed system using real-time Vernam enciphering.

© 2001 Optical Society of America

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