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基于偏振滤波抑制背景光的量子密钥分配系统

Quantum Key Distribution System Based on Polarization Filtering for Background Light Suppression

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摘要

基于相位合成偏振技术,利用离散相位编码构建了自由空间量子密钥分配系统,在时域、空域、频域滤波的基础上,结合大气背景光的偏振度模型,通过偏振滤波抑制背景光。研究结果表明,当大气背景光的偏振度为0.6时,偏振滤波的背景光抑制比最高可达5;对比未加入偏振滤波的情况,由背景光引起的系统误码率降低了近80%。

Abstract

With the discrete phase encoding, a free space quantum key distribution system is constructed based on the phase synthetic polarization technique. On the basis of the temporal filtering, spatial filtering and spectral filtering, the polarization filtering combined with the model of the polarization degree of the atmospheric background light is used to suppress the background noise. The research results show that, the background light suppression ratio is up to 5 when the polarization degree of the atmospheric background light is 0.6. Compared with the situation without polarization filtering, the bit error rate of the system caused by the background light is reduced by 80%.

Newport宣传-MKS新实验室计划
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中图分类号:O431.2

DOI:10.3788/aos201838.1227001

所属栏目:量子光学

基金项目:国家自然科学基金(61601497)

收稿日期:2018-05-24

修改稿日期:2018-06-27

网络出版日期:2018-07-31

作者单位    点击查看

朱秋立:空军工程大学信息与导航学院, 陕西 西安 710077
石磊:空军工程大学信息与导航学院, 陕西 西安 710077
魏家华:空军工程大学信息与导航学院, 陕西 西安 710077
朱宇:空军工程大学信息与导航学院, 陕西 西安 710077
杨汝:空军工程大学信息与导航学院, 陕西 西安 710077
周凯航:空军工程大学信息与导航学院, 陕西 西安 710077
赵顾颢:空军工程大学信息与导航学院, 陕西 西安 710077

联系人作者:石磊(slfly2012@163.com); 朱秋立(312411498@qq.com);

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引用该论文

Zhu Qiuli,Shi Lei,Wei Jiahua,Zhu Yu,Yang Ru,Zhou Kaihang,Zhao Guhao. Quantum Key Distribution System Based on Polarization Filtering for Background Light Suppression[J]. Acta Optica Sinica, 2018, 38(12): 1227001

朱秋立,石磊,魏家华,朱宇,杨汝,周凯航,赵顾颢. 基于偏振滤波抑制背景光的量子密钥分配系统[J]. 光学学报, 2018, 38(12): 1227001

被引情况

【1】龚峰,杨鑫,王天一. 利用光放大器改进自参考连续变量量子密钥分发. 激光与光电子学进展, 2019, 56(21): 212702--1

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