After-pulse-discarding in single-photon detection to reduce bit errors in quantum key distribution | Zendy

Akio Yoshizawa | Zendy; R. Kaji | Zendy; Hidemi Tsuchida | Zendy

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After-pulse-discarding in single-photon detection to reduce bit errors in quantum key distribution

Author(s) -

Akio Yoshizawa,

R. Kaji,

Hidemi Tsuchida

Publication year - 2003

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.11.001303

Subject(s) - quantum key distribution , optics , detector , photon , physics , photon counting , realization (probability) , bit error rate , optical fiber , photonics , pulse (music) , key (lock) , quantum optics , optoelectronics , computer science , telecommunications , channel (broadcasting) , mathematics , statistics , computer security

We demonstrate fiber-optic quantum key distribution (QKD) at 1550 nm using single-photon detectors operating at 5 MHz. Such high speed single-photon detectors are essential to the realization of efficient QKD. However, after-pulses increase bit errors. In the demonstration, we discard after-pulses by measuring time intervals of detection events. For a fiber length of 10.5 km, we have achieved a key rate of 17 kHz with an error of 2%.

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