摘要
为提升自由空间量子通信系统性能,以相敏放大器(PSA)和相位非敏感放大器(PIA)原理为基础,研究了在量子通信系统接收端分别加入PSA、PIA后的高斯调制连续变量量子密钥分发(CVQKD)模型,推导了相应的安全密钥率公式。当信号波长分别为810 nm、1550 nm和3800 nm时,仿真分析了系统受到集体攻击和个体攻击情况下接收端采用零差检测和外差检测时安全密钥率与距离的变化关系,对比了相同条件下PSA、PIA对系统性能的提升效果。仿真结果表明:当接收端分别采用零差检测、外差检测时,系统相应选择PSA、PIA时的性能更好。
In order to improve the performance of free space quantum communication system,based on the principles of phase sensitive amplifier(PSA)and phase insensitive amplifier(PIA),Gaussian modulated continuous variable quantum key distribution(CVQKD)with PSA and PIA at the receiver of quantum communication system is studied,deduces the corresponding security-key rate formula.When the signal wavelength is 810 nm,1550 nm and 3800 nm respectively,the simulation analyzes the relationship between the security-key rate and the distance when the receiver adopts homodyne detection and heterodyne detection under the collective attack and individual attack,and compares the improvement effects of PSA and PIA on the system performance under the same conditions.The simulation results show that when the receiver adopts homodyne detection and heterodyne detection respectively in detection and heterodyne detection,the system has better performance when PSA and PIA are selected accordingly.
作者
刘涛
王平平
房新新
李佳佳
邱佳
王思佳
刘舒宇
张荣香
LIU Tao;WANG Pingping;FANG Xinxin;LI Jiajia;QIU Jia;WANG Sijia;LIU Shuyu;ZHANG Rongxiang(Department of Electronic and Communication Engineering,North China Electric Power University,Baoding Hebei 071003,China;Hebei Key Laboratory of Power Internet of Things Technology,North China Electric Power University,Baoding Hebei 071003,China;Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology,North China Electric Power University,Baoding Hebei 071003,China;College of Physics Science and Technology,Hebei University,Baoding Hebei 071002,China)
出处
《光通信技术》
2022年第1期49-56,共8页
Optical Communication Technology
基金
国家自然科学基金(批准号:62071180)资助
中央高校基本科研业务费专项基金(编号:2020MS099)资助。
关键词
连续变量量子密钥分发
自由空间量子通信
光放大器
安全密钥率
continuous variable quantum key distribution
free space quantum communication
optical amplifier
secret-key rate
