基于单边带调制技术的数据中心光互连性能分析  

Performance analysis of data center optical interconnectionbased on single-side band modulation technologies

作　　者：周娴[1] 卢东旭 霍佳皓[1] 张帆[2] 隆克平[1] ZHOU Xian;LU Dongxu;HUO Jiahao;ZHANG Fan;LONG Keping(Institute of Advanced Network Technology and New Services,University of Science and Technology Beijing,Beijing 100083,P.R.China;State Key Laboratory of Advanced Optical Communication Systems and Networks,Peking University,Beijing 100083,P.R.China)

机构地区：[1]北京科技大学先进网络技术与新业务研究所,北京100083 [2]北京大学区域光纤通信网与新型光通信系统国家重点实验室,北京100871

出　　处：《重庆邮电大学学报（自然科学版）》2020年第5期707-718,共12页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家重点研发计划(2019YFB1803905);国家自然科学基金(61871030,61671053);中央高校基本科研业务费专项资金(FRF-MP-19-009)。

摘　　要：面向数据中心短距光互连传输的强度调制与直接检测(intensity modulation and direct detection,IM-DD)技术,在光纤低损耗窗口C波段传输时,色散效应将引入严重的频率选择性功率衰退问题。从IM-DD系统色散损伤理论分析入手,阐述了利用单边带(single side band,SSB)调制技术实现高色散鲁棒性传输的机理,并对系统设计的关键问题进行了讨论与综述,包括4种SSB信号的生成方式、2类信号调制格式和2种提取SSB信号线性映射项的数字信号处理(digital signal processing,DSP)算法。通过搭建SSB系统仿真分析平台,对信号生成方式、调制格式、DSP算法进行了对比与评价。通过对SSB调制光互连传输系统的理论与技术研究分析、关键参数讨论,将为实际高色散鲁棒性短距光互连系统的设计和评估提供指导。For short reach optical interconnects based on intensity modulation and direct detection(IM-DD)technology,the chromatic dispersion will induce severe frequency selective power fading influence during transmission on the low-loss C-band window.In this paper,we first analyze the theory of dispersion damage in IM-DD systems,and introduce the principle of high dispersion robustness optical interconnection transmission based on single side band(SSB)modulation.Next,the key technologies of SSB systems are reviewed and discussed,including four SSB signal generation methods,two signal modulation formats and two digital signal processing(DSP)algorithms used to extract linear signal item from the detected SSB signal.Finally,these key issues of SSB systems are investigated and evaluated by simulation in detail.The theoretical analyses and key parameter discussions given in this work will be helpful to guide the design and evaluation the SSB-based short-distance optical interconnection systems with high dispersion robustness in practice.

关 键 词：短距光互连 直接检测 高色散鲁棒性 单边带调制 

分 类 号：TN913[电子电信—通信与信息系统]