基于不同光纤的波分复用型量子密钥分配研究

doi:10.3969/j.issn.1007-5461.2022.05.011

量子电子学报 ›› 2022, Vol. 39 ›› Issue (5): 776-785.doi: 10.3969/j.issn.1007-5461.2022.05.011

基于不同光纤的波分复用型量子密钥分配研究

赵良圆1,2,3∗ , 曹凌云1 , 梁洪源1 , 韦峥1 , 伍千军1 , 钱建林2 , 韩正甫3∗

( 1 江苏亨通问天量子信息研究院有限公司, 江苏苏州 215200; 2 江苏亨通光电股份有限公司, 江苏苏州 215200; 3 中国科学院量子信息重点实验室, 安徽合肥 230026 )

收稿日期:2021-03-12 修回日期:2021-06-04 出版日期:2022-09-28 发布日期:2022-09-28
通讯作者: E-mail: zhaoly@htgd.com.cn; zfhan@ustc.edu.cn E-mail:E-mail: zhaoly@htgd.com.cn; zfhan@ustc.edu.cn
作者简介:赵良圆 ( 1990 - ), 河南平顶山人, 博士, 高级工程师, 主要从事量子保密通信方面的研究。 E-mail: zhaoly@htgd.com.cn
基金资助:
Supported by Natural Science Foundation for Youths of Jiangsu Province (江苏省自然科学基金青年基金项目, BK20180193), China Postdoctoral Science Foundation (中国博士后科学基金资助项目, 2018M632226)

Research on wavelength-multiplexed quantum key distribution based on diﬀerent optical ﬁbers

ZHAO Liangyuan 1,2,3∗ , CAO Lingyun 1 , LIANG Hongyuan 1 , WEI Zheng 1 , WU Qianjun 1 , QIAN Jianlin 2 , HAN Zhengfu 3∗

( 1 Jiangsu Hengtong Qasky Quantum Information Research Institute Co., Ltd., Suzhou 215200, China; 2 Jiangsu Hengtong Optic-Electric Co., Ltd., Suzhou 215200, China; 3 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China )

Received:2021-03-12 Revised:2021-06-04 Published:2022-09-28 Online:2022-09-28

摘要/Abstract

摘要： 基于波分复用技术可以实现量子与经典信号在同一根光纤中共传。由于经典信号与光纤的非线性相互作用引起的噪声会降低量子密钥分配 QKD 的信噪比, 需要采取措施降低经典噪声的影响。与以往对 QKD 设备侧的改造不同, 从光纤传输线路的角度出发, 通过对比不同种类光纤的性质, 建立波分复用单纤传输量子密钥分配噪声模型, 结合诱骗态和有限长安全分析方法, 分析了不同种类光纤对共纤 QKD 背景噪声计数率、安全密钥率和最大安全传输距离等性能的影响。对 G.652、G.654 和 G.655 三种光纤的数值仿真结果表明, G.655 光纤可以降低共纤 QKD 的背景噪声计数率, G.654 光纤可以增大共纤 QKD 的安全密钥率和最大安全传输距离, 而常用的标准单模光纤 G.652 对于共纤 QKD 性能的影响居于三者之间。

关键词: 量子信息, 量子密码, 量子密钥分配, 波分复用, 光纤, 非线性相互作用

Abstract: Based on wavelength division multiplexed (WDM) technology, quantum and classical signals can be transmitted together in the same ﬁber. However, the noise caused by the nonlinear interaction between classical signals and optical ﬁber will reduce the signal-to-noise ratio of quantum key distribution (QKD), so measures need to be taken to reduce the inﬂuence of classical noise. Diﬀerent from the previous methods focusing on QKD device, the background noise rate, secret key rate and maximum secure transmission distance of WDM-QKD for diﬀerent kinds of ﬁbers are analyzed and compared by establishing the classical noises, decoy-state and ﬁnite-key models from the perspective of optical ﬁber transmission in this work. The numerical simulation results show that G.655 ﬁber can reduce the background noise rate of WDM-QKD, G.654 ﬁber can increase the secure key rate and the maximum secure transmission distance, while the performance of WDM-QKD with the popular standard single-mode ﬁber G.652 is in the middle of the three cases.

Key words: quantum information, quantum cryptography, quantum key distribution, wavelength division multiplexed, optical ?ber, nonlinear interaction

中图分类号:

O431.2

赵良圆曹凌云梁洪源韦峥伍千军钱建林韩正甫. 基于不同光纤的波分复用型量子密钥分配研究[J]. 量子电子学报, 2022, 39(5): 776-785.

ZHAO Liangyuan , ∗ , CAO Lingyun , LIANG Hongyuan , WEI Zheng , WU Qianjun , QIAN Jianlin , HAN Zhengfu ∗. Research on wavelength-multiplexed quantum key distribution based on diﬀerent optical ﬁbers[J]. Chinese Journal of Quantum Electronics, 2022, 39(5): 776-785.

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基于不同光纤的波分复用型量子密钥分配研究

Research on wavelength-multiplexed quantum key distribution based on diﬀerent optical ﬁbers

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