A novel synchronization scheme for free-space quantum key distribution system

Feng Tang; Shuang Gao; Xiaofei Wang; Bing Zhu

doi:10.1117/12.917952

14 December 2011 A novel synchronization scheme for free-space quantum key distribution system

Feng Tang, Shuang Gao, Xiaofei Wang, Bing Zhu

Proceedings Volume 8309, Optical Transmission Systems, Subsystems, and Technologies IX; 83093C (2011) https://doi.org/10.1117/12.917952
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

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.

Citation Download Citation

Feng Tang, Shuang Gao, Xiaofei Wang, and Bing Zhu "A novel synchronization scheme for free-space quantum key distribution system", Proc. SPIE 8309, Optical Transmission Systems, Subsystems, and Technologies IX, 83093C (14 December 2011); https://doi.org/10.1117/12.917952

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