海洋气泡对水下量子通信性能的影响  

Effect of Marine Bubbles on the Performance of Underwater Quantum Communication Channel

作　　者：张秀再[1,2] 葛羽洁 翟梦思 周丽娟 Zhang Xiuzai;Ge Yujie;Zhai Mengsi;Zhou Lijuan(Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,Jiangsu,China;School of Electronics&Information Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,Jiangsu,China)

机构地区：[1]南京信息工程大学江苏省大气环境与装备技术协同创新中心,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《光学学报》2023年第18期251-260,共10页Acta Optica Sinica

基　　金：国家自然科学基金青年科学基金(11504176,61601230);江苏省自然科学基金青年基金(BK20141004)。

摘　　要：随着水下无线通信的发展,关于海洋环境量子通信的研究也逐渐成为热点。其中,研究海洋气泡对光量子在水下传输的影响具有重要意义。为了研究海洋气泡对水下量子通信信道性能的影响,根据海洋气泡的粒径分布模型,研究了气泡的散射特性,并根据气泡的消光系数,分析了不同条件参数对链路衰减、纠缠度、信道容量以及信道误码率的影响,并进行了仿真实验。结果表明:气泡浓度和传输距离的增大,使链路衰减和误码率增加,对于幅值阻尼信道、退极化信道和比特翻转信道,其信道容量均有所减小;随着气泡半径的增大、深度的减小,信道纠缠度降低。由此可见,海洋气泡对量子通信性能的影响不可忽略,在实际应用中为了保障水下量子通信的传输效率,应适当调节水下量子通信相关参数,减小海洋气泡环境对通信系统的影响。Objective In recent years,quantum communication has become a research hotspot in China and abroad for its better data transmission security.As the core of the quantum information theory,quantum communication can be more secure and reliable for information transmission and is an important direction of inquiry.With the development of underwater wireless communication,it is important to research underwater quantum communication for marine and military fields.Bubbles are ubiquitous in the ocean,and the scattering and refraction effects of bubbles on light can cause certain losses in optical quantum transmission,which exerts a certain impact on the performance of underwater optical quantum communication.However,the research on the effect of bubbles on the channel performance of underwater quantum communication has not been conducted.By building the particle size distribution and scattering coefficient models of marine bubbles,the paper analyzes the effects of different condition parameters on link attenuation,entanglement,channel capacity,and channel bit error rate(BER)in the marine bubble environment to investigate the influence of these bubbles on the channel performance of underwater quantum communication.This is of great significance to improve the efficiency of underwater quantum communication.Methods Marine bubbles are mainly generated by wind-driven wave breaking.With an aim to study the influence of marine bubbles on the channel performance of underwater quantum communication,the particle size distribution function of the bubbles is firstly derived and established.The scattering characteristics and extinction coefficient of the bubbles are studied according to the particle size distribution model of marine bubbles.Additionally,according to the extinction characteristics,the relationship between marine bubble parameters and link attenuation is firstly established,and then the effects of different depths and bubble radi on channel entanglement are analyzed.Then,the effects of different bubble concentrations and

关 键 词：海洋气泡 水下量子通信 链路衰减 信道纠缠度 信道容量 

分 类 号：TN929.3[电子电信—通信与信息系统] O431.2[电子电信—信息与通信工程]