基于阵列叠加OAM编码的图像传输方法及系统  

Image transmission based on array superimposed OAM encoding

作　　者：胡骏保 雷雨 莫绪涛[1] 吴建光[1] 刘义[1] 王东[1] 黄仙山[2] HU JunBao;LEI Yu;MO XuTao;WU JianGuang;LIU Yi;WANG Dong;HUANG XianShan(School of Microelectronics&Data Science,Anhui University of Technology,Ma’anshan 243002,China;Innovation and Entrepreneurship College,Anhui University of Technology,Ma’anshan 243002,China)

机构地区：[1]安徽工业大学微电子与数据科学学院,马鞍山243002 [2]安徽工业大学创新创业学院,马鞍山243002

出　　处：《中国科学：物理学、力学、天文学》2024年第12期85-92,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:62175001);安徽省高校优秀青年人才支持计划(编号:gxyq2022014);安徽工业大学人才项目(编号:QD202306,QD202378);安徽省高校自然科学研究项目(编号:2024AH050168)资助。

摘　　要：阵列OAM编码传输是一种提高信息容量的潜在方法,对实现大容量光通信具有重要研究价值,但存在系统复杂度高、调控不灵活的问题.本文提出了一种可灵活调控的阵列叠加OAM编码图像传输的方法,通过设计2×2达曼光栅生成2×2阵列高斯光束,随后通过匹配整合涡旋全息光栅生成2×2阵列叠加涡旋光束,阵列叠加涡旋光束的各子通道均可自由独立调控,且实验装置简单、易于操作.基于此,搭建了阵列叠加OAM编码图像传输系统,对一幅小狗灰度图像进行编码及传输.实验结果表明:在无任何干扰的情况下,实现了零误码的图像传输;在有湍流干扰情况下,图像传输误码率为0.001;在严重湍流干扰情况下,传输误码率达到0.089.此外,采用2×2阵列涡旋光模式,相对于传统单涡旋光编码数据传输的方法,所携带的信息容量扩大了4倍.该阵列叠加涡旋光编码通信方法及系统对实现大容量OAM光通信具有重要参考价值.Array OAM-coded data transmission is a potential method to improve the information capacity and has important research value for realizing high-capacity optical communication.However,there are problems related to high system complexity and inflexible regulation.In this paper,an optical communication method and system for flexible tunable array multi-channel OAM-coded image transmission is proposed.In order to obtain an array beam,we first generate an array Gaussian beam using a specially designed Dammann grating instead of a conventional way of generating an array Gaussian beam through the combination of multiple beam-splitting prisms and mirrors,which reduces the complexity of the system.Subsequently,we obtained a 2×2 array vortex beam by designing an integrated vortex holographic grating and matching the generated array Gaussian beam.In our 2×2 array vortex setup,each subchannel of the array vortex beam can be freely and independently regulated,and the experimental setup is simple and easy to operate.Based on this,we built an array OAM-coded image transmission system to encode and transmit a 110-pixel×110-pixel 256-grayscale puppy image.The experimental results show that zero-BER(bit error rate)image recovery is achieved without any interference;in the presence of turbulence interference,the BER of image transmission is 0.001;in the presence of severe turbulence interference,the BER reaches 0.089.To address the problem of high transmission BER in harsh environments,in our future work,we will consider introducing a deep learning technique to improve the accuracy of the calculation of the bright‘petals’of the array,to reduce the BER and improve the transmission performance.In addition,the use of a 2×2 array optical mode expands the information capacity by a factor of 4 compared with the conventional single-channel optical coding data transmission method.In the follow-up work,m×m(m>2)array OAM-coded information transmission will be investigated to further improve the information capacity.The results of th

关 键 词：涡旋光束 阵列光束 轨道角动量 光通信 

分 类 号：TN919.81[电子电信—通信与信息系统] TN929.1[电子电信—信息与通信工程]