基于遗传算法的水下光传输优化  

Underwater Wireless Optical Transmission Based on Genetic Algorithm

作　　者：李博骁[1,2] 张峰 田蕾[3] 聂杰文 杨海宁 LI Boxiao;ZHANG Feng;TIAN Lei;NIE Jiewen;YANG Haining(China Academy of Electronics and Information Technology,Beijing 100041,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;School of Electronic Science and Engineering,Southeast University,Nanjing Jiangsu 210096,China)

机构地区：[1]中国电子科学研究院,北京100041 [2]清华大学电子工程系,北京100084 [3]东南大学电子科学与工程学院,江苏南京210096

出　　处：《电子器件》2022年第3期636-639,共4页Chinese Journal of Electron Devices

基　　金：江苏省自然基金项目(BK20200351)。

摘　　要：水下光传输作为海洋探索的关键技术,具有光束固有的高带宽、低时延、传输距离可观等优势,在水下光通信、光成像等领域起着重要作用,然而其传输特性受光束的发散以及水体的吸收和散射作用,导致严重的光束能量损失,大大限制了传输距离和信噪比等关键传输性能。为了提高光束在水体中的传输效率,提出了一种基于遗传算法的光束整形模块,通过空间光调制器对波前进行编码调制,结合遗传算法的寻优能力实现最佳波前整形全息图,进而补偿水体对该光束的相位调制。基于此原理,开展了水下20 m内验证实验,实现接收端中心能量约5.6倍提升。As a key technology for ocean exploration,underwater optical communication has inherent advantages of high bandwidth,low delay and considerable transmission distance.It plays an important role in underwater optical communication and optical imaging.However,its transmission characteristics are affected by the beam divergence and absorption and scattering of water,resulting in serious beam energy loss.Therefore,the effective transmission distance and signal-to-noise ratio are limited.In order to improve the transmission efficiency of beam in water,a beam shaping module based on genetic algorithm was proposed.The wavefront was encoded and modulated by a spatial light modulator,and the optimal wavefront shaping hologram is realized by combining the optimization capability of genetic algorithm.Based on this principle,an underwater verification experiment was carried out within 20 m,and the center energy of the receiving end was increased by about 5.6 times.

关 键 词：遗传算法 空间光调制器 光束整形 

分 类 号：TN791[电子电信—电路与系统]