波分复用量子密钥分发拉曼噪声分析及最佳波段选择算法  

Raman Noise Analysis and Optimal Band Selection Algorithm for Wavelength Division Multiplexing Quantum Key Distribution

作　　者：周晓东 张松磊 方晓明 卞宇翔 冯宝 刘志昊[4] Zhou Xiaodong;Zhang Songlei;Fang Xiaoming;Bian Yuxiang;Feng Bao;Liu Zhihao(Information and communication branch of State Grid Fujian Electic Power Co.,Ltd.,Fuzhou,Fujian 350003,China;Nanjing NARI Information&Communication Technology Co.,Ltd.,Nanjing,Jiangsu 210003,China;Nanjing NRGD Quantum Technology Co.,Ltd.,Nanjing,Jiangsu 210003,China;School of Computer Science and Engineering,Southeast University,Nanjing,Jiangsu 211189,China)

机构地区：[1]国网福建省电力有限公司信息通信分公司,福建福州350003 [2]南京南瑞信息通信科技有限公司,江苏南京210003 [3]南京南瑞国盾量子技术有限公司,江苏南京210003 [4]东南大学计算机科学与工程学院,江苏南京211189

出　　处：《激光与光电子学进展》2022年第5期302-309,共8页Laser & Optoelectronics Progress

基　　金：国网福建省电力有限公司科技项目(52130M19000Y)。

摘　　要：经典-量子信道复用技术旨在提升量子保密通信的信道利用率,但噪声串扰会严重制约量子信道的传输效率。基于对信道拉曼噪声干扰的分析,使用组合优化方法对信道分配策略进行优化,提出了一种适用于量子密钥分发(QKD)系统的最佳波段选择算法。所提波段选择算法基于噪声与信道相对位置间的相关联性,利用组合优化方法优化经典及量子信道的分配,从而得到最小化噪声的多波段复用方案。与传统双波段复用方案相比,所得最佳多波段复用方案可有效降低不同频段间经典光对量子光的干扰,从而提高信道传输的密钥率。Although classical-quantum channel multiplexing technology attempts to improve the channel use of quantum secure communication,noise crosstalk severely limits the quantum channel transmission efficiency.A combined optimisation method is used to optimise the channel allocation strategy based on channel Raman noise interference analysis,and an optimal band selection algorithm suited for the quantum key distribution system is proposed.The allocation of classical and quantum channels is adjusted and optimised using the proposed combinatorial optimisation algorithm based on the correlation between the noise and channel relative position to obtain a multi-band multiplexing scheme that minimises noise.Compared with the traditional dual band multiplexing scheme,the optimal multi band multiplexing scheme can effectively reduce the interference of classical light to quantum light between different frequency bands,so as to improve the key rate of channel transmission.

关 键 词：量子光学 量子通信 量子密钥分发 信道复用 波分复用 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]