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Proceedings Paper

A novel synchronization scheme for free-space quantum key distribution system
Author(s): Feng Tang; Shuang Gao; Xiaofei Wang; Bing Zhu
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Paper Abstract

We propose a novel synchronization scheme using a periodic light pulse for free-space quantum key distribution (QKD) system. For our 10MHz system, the repetition rate of timing pulse in the novel synchronization scheme can be reduced to 100 KHz or even lower. It allows employing a KHz repetition rate ultrashort pulse laser as timing synchronization source to implement high precision time synchronization. In this paper, short term time drift induced by atmospheric turbulence is analyzed, and how the time deviation impacts on the final secure key generation rate in our QKD system is calculated. In addition, we carried out the QKD experiments over the distance of 1.38 km. The results of the experiments indicate that our scheme is feasible.

Paper Details

Date Published: 14 December 2011
PDF: 7 pages
Proc. SPIE 8309, Optical Transmission Systems, Subsystems, and Technologies IX, 83093C (14 December 2011); doi: 10.1117/12.917952
Show Author Affiliations
Feng Tang, Univ. of Science and Technology of China (China)
Shuang Gao, Univ. of Science and Technology of China (China)
Xiaofei Wang, Univ. of Science and Technology of China (China)
Bing Zhu, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 8309:
Optical Transmission Systems, Subsystems, and Technologies IX
Xiang Liu, Editor(s)

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