光束跨波动水空界面传输的表征与验证  

Characterization and Validation of Beam Transmission Through Wavy Water⁃to⁃Air Surface

作　　者：张凡 罗江华 李军 林天瑞 龚晨 徐正元[3] Zhang Fan;Luo Jianghua;Li Jun;Lin Tianrui;Gong Chen;Xu Zhengyuan(Cooperative Innovation Center of Unconventional Oil and Gas,Yangtze University(Ministry of Education&Hubei Province),School of Physics and Optoelectronic Engineering,Yangtze University,Jingzhou 434023,Hubei,China;Zhongshan Zhongchuang Technology Research Institute of Opto-Electronics Industry,Zhongshan 528415,Guangdong,China;Key Laboratory of Wireless-Optical Communications,Chinese Academy of Sciences,School of Information Science and Technology,University of Science and Technology of China,Hefei 230027,Anhui,China)

机构地区：[1]长江大学非常规油气省部共建协同创新中心,长江大学物理与光电工程学院,湖北荆州434023 [2]中山市中创光电产业技术研究院,广东中山528415 [3]中国科学院无线光通信重点实验室,中国科学技术大学信息科学技术学院,安徽合肥230027

出　　处：《中国激光》2023年第19期82-90,共9页Chinese Journal of Lasers

基　　金：国家重点研发计划(2018YFB1801904);国家自然科学基金(62171428);长江大学非常规油气省部共建协同创新中心开放基金(UOG2022-07)。

摘　　要：在跨水空界面可见光通信(W2A‐VLC)中,动态水面波浪会导致光束折射、接收到的光信号强度随机波动。本文重点研究规则波浪和随机波浪对光无线传输的影响,采用实验与理论仿真相结合的方法,研究跨波动水空界面的可见光传输,分析光信号传输的物理响应及其链路性能。先通过实验测试激光二极管(LD)窄光束传输,获得接收端光斑的统计特性,然后将其与蒙特卡罗仿真结果进行对比,结果发现规则波浪和随机波浪引起的光子能量分布的统计规律不同。接着从发光二极管(LED)宽光束传输的角度验证LD的传输特性,即:将LED视为窄光束的集成,进行仿真和真实的W2A‐VLC实验验证;仿真结果与实验结果一致,从而从宽光束角度证明了窄光束的统计规律。Objective To explore and exploit ocean resources,it is necessary to establish wireless communication networks between underwater and air platforms.In these wireless networks,data should be transmitted efficiently across the water-to-air(W2A)interface;reliable W2A communication links play a significant role in such data transmission.Although acoustic waves are the primary means for communication in water because of their long propagation distance(up to several kilometers),they are mostly reflected off when crossing the water surface.Moreover,the transmission rate of an acoustic communication system is relatively low(on the order of kb/s),which limits its application.Radio frequency waves are suitable for long distances(up to tens of kilometers)and high transmission rates(up to hundreds of Mb/s)of wireless communication in air,but they can only travel a few meters through water because of their high absorption and attenuation in underwater environments.Compared with acoustic and RF waves,optical waves can achieve long-distance wireless transmission in both water and air media;they provide a very high bandwidth,high transmission rate,and low latency and enable the use of advanced transceiver devices.Thus,the use of optical waves is a potential solution for communication across the W2A interface.However,when a light beam passes across the W2A interface,the propagating photons experience an unpredictable path deviation owing to the dynamic nature of the waves.Therefore,it is necessary to obtain the statistical properties of the physical responses of photons passing across different W2A interfaces,which can be used to characterize the correlation between the light beam drift and water wave dynamics.Methods This study focused on water-to-air visible light communication(W2A-VLC)through regular and random waves.The physical response of the propagating photons and corresponding link performances were evaluated by combining laboratory experiments with theoretical simulations.First,we built a laser diode(LD)transmission expe

关 键 词：光通信 规则波浪 随机波浪 蒙特卡罗仿真 窄光束 宽光束 

分 类 号：TN929.1[电子电信—通信与信息系统]