摘要
基于光量子探测的无线激光通信技术在天地一体化保密通信网络中具有重要应用。基于光源光子数的泊松分布模型、大气湍流Gamma-Gamma模型、单光子探测器响应模型和相关计数信号处理方法建立了湍流信道中光量子通信系统的误码率(BER)计算模型,仿真分析了光源光子数分布、湍流信道参数、单光子探测器性能参数、相关计数方法等对系统BER的影响。结果表明,系统BER与激光脉冲平均光子数、脉冲频率和探测器探测效率呈负相关关系;而系统BER与大气湍流强度、探测器暗计数呈正相关;采用相关计数方法可有效降低系统BER,当开门次数确定时,系统存在一个最佳判别门限。所提模型可为光量子通信系统的设计与优化提供参考。
The wireless laser communication technology using optical quantum detection has broad application prospects in heaven and earth integrated secure communication networks.Based on the Poisson distribution model of photon number of a laser source,the atmospheric turbulence Gamma-Gamma model,the response model of the single photon detector,and the correlation counting signal processing method,we establish a calculation model of bit error rate of the optical quantum communication system in the turbulent channel.The effects of the distribution of photon number of the laser source,turbulent channel parameter,performance parameters of single photon detectors,and correlation counting method on the system BER are simulated.The results show that the system BER is negatively correlated with the average photon number of laser pulses,pulse frequency,and detector detection efficiency,while it is positively correlated with atmospheric turbulence intensity and detector dark counting.The system adopting the correlation counting method can effectively reduce the system BER.When the number of door openings is determined,the system has an optimal threshold for discrimination.The proposed model can provide references for the design and optimization of the optical quantum communication systems.
作者
刘旭超
李华贵
孙时伦
武文周
李少波
Liu Xuchao;Li Huagui;Sun Shilun;Wu Wenzhou;Li Shaobo(54 th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang,Hebei 050081,China;Hebei Key Laboratory of Photonic Information Technology and Application,Shijiazhuang,Hebei 050081,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2022年第3期240-245,共6页
Acta Optica Sinica
关键词
量子光学
光量子通信
大气湍流
相关计数
误码率
quantum optics
optical quantum communication
atmospheric turbulence
correlated counting
bit error rate
