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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 6, Iss. 5 — May. 1, 2008
  • pp: 320–322

Quick single-photon detector with many avalanche photo diodes working on the time division

Jian Peng, Yifei Fu, Li Yao, Xudong Shang, Zhixin Lu, Bojun Yang, and Li Yu  »View Author Affiliations

Chinese Optics Letters, Vol. 6, Issue 5, pp. 320-322 (2008)

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Due to the limit of response speed of the present single-photon detector, the code rate is still too low to come into practical use for the present quantum key distribution (QKD) system. A new idea is put up to design a quick single-photon detector. This quick single-photon detector is composed of a multi-port optic-fiber splitter and many avalanche photo diodes (APDs). All of the ports with APDs work on the time division and cooperate with a logic discriminating and deciding unit driven by the clock signal. The operation frequency lies on the number N of ports, and can reach N times of the conventional single-photon detector. The single-photon prompt detection can come true for high repetition-rate pulses. The applying of this detector will largely raise the code rate of the QKD, and boost the commercial use.

© 2008 Chinese Optics Letters

OCIS Codes
(040.5160) Detectors : Photodetectors
(060.4510) Fiber optics and optical communications : Optical communications
(230.5160) Optical devices : Photodetectors
(270.5570) Quantum optics : Quantum detectors

Jian Peng, Yifei Fu, Li Yao, Xudong Shang, Zhixin Lu, Bojun Yang, and Li Yu, "Quick single-photon detector with many avalanche photo diodes working on the time division," Chin. Opt. Lett. 6, 320-322 (2008)

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