| 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 |
|
| Cite this article: |
|
LIU Yun, WU Qing-Lin, HAN Zheng-Fu et al 2006 Chin. Phys. Lett. 23 252-255 |
|
|
|
|
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)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
