Chin. Phys. Lett.  2006, Vol. 23 Issue (1): 252-255    DOI:
Original Articles |
Single Photon Detector at Telecom Wavelengths for Quantum Key Distribution
LIU Yun;WU Qing-Lin;HAN Zheng-Fu;DAI Yi-Min;GUO Guang-Can
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026
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LIU Yun, WU Qing-Lin, HAN Zheng-Fu et al  2006 Chin. Phys. Lett. 23 252-255
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Abstract Using InGaAs/InP avalanche photodiodes as sensors and coaxial cables as reflection lines to reject spike signals, we have firstly employed the ``timing filtering'' gates to pick out avalanche signals and have realized the single photon detection at 1550nm in the temperature range of thermoelectric cooling. A ratio of the dark count rate to the detection efficiency was obtained to be 9×10-5 at 223K. When the detector is applied to a practical quantum key distribution system, the transmission distance can reach 89.5km and the repetition rate can reach 0.33MHz.
Keywords: 85.60.Dw      85.60.Gz      03.67.Dd     
Published: 01 January 2006
PACS:  85.60.Dw (Photodiodes; phototransistors; photoresistors)  
  85.60.Gz (Photodetectors (including infrared and CCD detectors))  
  03.67.Dd (Quantum cryptography and communication security)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I1/0252
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LIU Yun
WU Qing-Lin
HAN Zheng-Fu
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GUO Guang-Can
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Supported by the Fundamental Research Funds for the Central Universities (Grant No. 2019XD-A02), and the State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (Grant No. IPO2019ZT06).

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