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Proceedings Paper

The quick single-photon detector with many avalanche photo-diodes for quantum key distribution
Author(s): Jian Peng; Li Yao; YiFei Fu; XuDong Xiang; ZhiXin Lu; BoJun Yang; Li Yu
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Paper Abstract

It is the closest technology to practice in the quantum communication at present to apply single-photon scheme to implement the quantum key distribution (QKD), and may achieve the absolute security in principle. Because of the limit of the response speed of the present single-photon detector, the code rate is still too low to come into practical use. The paper has put up a new idea to design a quick single-photon detector with a multi-port optic-fiber splitter or an optical switch array and many avalanche photo diodes (APD). All of the ports with APD work on time division and cooperate with the logic discrimination and deciding unit by the clock signal, thus the quick detection can come true to high repetition-rate pulses with a single photon. The multiple of the detection rate is decided by the number of the port. The optoelectronic integration can be adopted for the reliable detector. The applying of this detector will largely raise the code rate of the QKD, and stimulate the commercial use.

Paper Details

Date Published: 5 February 2008
PDF: 6 pages
Proc. SPIE 6838, Optoelectronic Devices and Integration II, 68380Z (5 February 2008); doi: 10.1117/12.756586
Show Author Affiliations
Jian Peng, Beijing Univ. of Posts and Telecommunications (China)
North China Electric Power Univ. (China)
Li Yao, Beijing Univ. of Posts and Telecommunications (China)
YiFei Fu, Beijing Univ. of Posts and Telecommunications (China)
XuDong Xiang, Beijing Univ. of Posts and Telecommunications (China)
ZhiXin Lu, Beijing Univ. of Posts and Telecommunications (China)
BoJun Yang, Beijing Univ. of Posts and Telecommunications (China)
Li Yu, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 6838:
Optoelectronic Devices and Integration II
Xuping Zhang; Hai Ming; Maggie Yihong Chen, Editor(s)

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