50 m/187.5 Mbit/s real-time underwater wireless optical communication based on optical superimposition

作     者：程永鑫 杨兴启 张雨凡 张超 张皓 童志坚 戴逸展 吕伟超 李鑫 邹海吾 张泽君 徐敬 Yongxin Cheng;Xingqi Yang;Yufan Zhang;Chao Zhang;Hao Zhang;Zhijian Tong;Yizhan Dai;Weichao Lü;Xin Li;Haiwu Zou;Zejun Zhang;Jing Xu

作者机构：Optical Communications LaboratoryOcean CollegeZhejiang UniversityZhoushan 316021China Hainan Institute of Zhejiang UniversitySanya 572025China Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang ProvinceOcean CollegeZhejiang UniversityZhoushan 316021China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2023年第21卷第2期

页      面：14-20页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：supported by the National Natural Science Foundation of China(NSFC)(No.61971378) Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA22030208) Zhoushan-Zhejiang University Joint Research Project(No.2019C81081) 

主　　题：underwater wireless optical communication FPGA PAM-4 

摘      要：In this paper,an optical pulse amplitude modulation with 4 levels(PAM-4)using a fiber combiner is proposed to enhance the data rate of a field-programmable gate-array-based long-distance real-time underwater wireless optical communication *** on-off keying signals with different amplitudes are used to modulate two pigtailed laser diodes,respectively,and the generated optical signals are superimposed into optical PAM-4 signals by a fiber *** optical PAM-4scheme can effectively alleviate the nonlinearity,although it reduces the peak-to-peak value of the emitting optical power by 25%.A real-time data rate of 187.5 Mbit/s is achieved by using the optical PAM-4 with a transmission distance of 50 *** data rate is increased by about 25%compared with the conventional electrical PAM-4 in the same condition.