基于全内反射透镜二次配光的水下LED通信研究  

Underwater LED Communication Based on Secondary Light Distribution with Total Internal Reflection Lens

作　　者：王涛[1,2] 韩彪 史魁[1] 吴亚风[1] 郑运强 韩毅 谢小平 汪伟[1] 孟佳成[1] Wang Tao;Han Biao;Shi Kui;Wu Yafeng;Zheng Yunqiang;Han Yi;Xie Xiaoping;Wang Wei;Meng Jiacheng(State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an,Shaanxi 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《光学学报》2019年第8期43-48,共6页Acta Optica Sinica

基　　金：国家重点研发计划(2017YFC0803900,2018YFC0307904);青岛海洋科学与技术试点国家实验室主任基金(QNLM201716)

摘　　要：蓝绿LED通信被认为是解决水下近距离高速无线数据传输的有效手段。然而由于LED发散角较大,造成通信链路的几何损耗增加,制约了水下LED通信距离的提升。针对这一问题,提出了一种基于全内反射(TIR)透镜压缩水下LED通信阵列光源出射角的方法,将LED通信光源的出射角从130°压缩到7°;利用该光源研制发射样机,在大型水池中搭建测试系统,并对发射机的性能进行测试。结果表明,所设计的通信样机在水下传输距离为16.6 m时,最大可支持23 Mbit/s的传输速率;与未采用TIR透镜时相比,在同等速率条件下,传输距离增加9.3 m。这表明基于TIR透镜二次配光的方法,可有效减小发射机出射角,降低链路损耗,增强通信系统的传输能力。这为提升水下LED通信的传输性能提供了新的技术思路。Blue-green LED communication is considered to be an effective means to solve the problem of underwater short-distance high-speed wireless data transmission.However,as LED divergence angle is usually quite large,the geometric loss is great in such communication link,which would reduce the communication distance.Aiming at this problem,a method is proposed to compress the emitter angle of underwater LED array light source with the total internal reflection(TIR)lens in this work.First,the divergence angle of LED array source is compressed from 130°to 7°.Then,a communication transmitter prototype is developed with the source,and a test system is built in a large tank to test the performance of the transmitter.The experimental results show that the communication prototype designed in this paper can support a maximum transmission rate of 23 Mbit/s when the underwater transmission distance is 16.6 m.Compared with the case without TIR lens,the maximum transmission distance increases 9.3 m at the same rate.It shows that the method of secondary light distribution with TIR lens can effectively reduce the transmitter′s divergence angle and the link loss of transmission system,enhance the transmission capacity of communication system.It provides a new technical means for improving the transmission performance of underwater LED communication.

关 键 词：光通信 无线光通信 水下光通信 蓝绿光通信 全内反射透镜 

分 类 号：TN29[电子电信—物理电子学]