利用2.5GHz光器件实现PAM4调制信号的传输技术研究  

Implementing PAM4 Technology by Employing 2.5 GHz Optical Components

作　　者：王之浩 王智[1] 何人鑫 李智勇[2] 匡迎新 刘磊[2] 吴重庆[1] WANG Zhi-hao;WANG Zhi;HE Ren-xin;LI Zhi-yong;KUANG Ying-xin;LIU Lei;WU Chong-qing(Key Laboratory of Luminescence and Optical Information,Ministry of Education,Institute of Optical Information,School of Science,Beijing Jiaotong University,Beijing 100044,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]北京交通大学理学院光信息科学与技术研究所发光与光信息技术教育部重点实验室,北京100044 [2]中国科学院半导体研究所集成光电子学实验室,北京101408

出　　处：《光学与光电技术》2020年第5期34-39,共6页Optics & Optoelectronic Technology

基　　金：国家自然科学基金(61571035);集成光电子学国家重点联合实验室(IOSKL2018KF22)资助项目。

摘　　要：光通信系统中,高阶调制技术能以较低的电子速率实现更高的系统容量和更高的频谱效率,四阶脉冲幅度调制(PAM4)为以太网高速通信提供了一种有效可行的解决方案。为了满足集成化、低成本的需要,提出一种PAM4传输方案,并利用商用2.5 GHz光器件通过双通道耦合的方法,实现了5 Gbit/s PAM4信号的传输实验方案;并设计一种离线DSP方案,对传输实验结果的数据进行优化。测试结果显示得到了较好的眼图,表明该方案应用于短距互联,可提高系统传输效率。In optical communication system,high-order modulation technology can realize higher system capacity and higher spectral efficiency with lower rate,PAM4 format provides an effective solution for high-speed Ethernet. A PAM4 transmission scheme is described,and an experimental scheme for the transmission of 5 Gbit/s PAM4 signal is realized by using the dual-channel coupling method of commercial 2.5 GHz optical components. An off-line DSP scheme is designed to optimize the data of experimental results. The experiment results show good eye diagrams,which indicates that the proposed scheme can improve the transmission efficiency of the system when applied to short distance interconnection.

关 键 词：光模块 四阶脉冲幅度调制 光纤通信系统 数字信号处理 

分 类 号：TN256[电子电信—物理电子学]