基于DP-BPSK调制器的四级光信号生成方案  

A four-level optical signal generation scheme based on DP-BPSK modulator

作　　者：胡霞 赵利 HU Xia;ZHAO Li(Changsha Aeronautical Vocational and Technical College,Changsha 410124,Hunan;Hunan Provincial Engineering Research Center for Missile Maintenance,Changsha 410124,Hunan;School of Information Science and Engineering,Fudan University,200433,Shanghai)

机构地区：[1]长沙航空职业技术学院,湖南长沙410124 [2]湖南省导弹维修工程技术研究中心,湖南长沙410124 [3]复旦大学信息科学与工程学院,上海200433

出　　处：《光学技术》2024年第2期142-145,149,共5页Optical Technique

基　　金：湖南省教育厅科学研究项目(23C1051)。

摘　　要：面对短距离光通信中不断增长的数据流量需求,以及高昂的高速数据中心互连成本,文章提出了一种基于双偏振二进制相移键控(DP-BPSK)调制器的四级光信号生成方案。所提方案的实验架构包括激光二极管(LD)、由二进制数据驱动的DP-BPSK调制器、偏振控制器(PC)和偏振器,无需数字模拟转换器,结构简单易于实现。为验证所提方案的可行性,采用方案生成了四级脉冲振幅调制(PAM-4)信号,并将生成的PAM-4信号以不同的数据速率在65km标准单模光纤(SSMF)上传输,传输信号的眼图和误码率实验结果表明信号具有较高质量。因此,所提方案在未来短距离光通信中具有良好的应用潜力。In the face of increasing data traffic demand in short-distance optical communication and the high cost of high-speed data center interconnection,a four-level optical signal generation scheme based on dual-polarization binaryphase-shift-keying(DP-BPSK)modulator is proposed.Experimental framework of the proposed scheme consists of a laser diode(LD),DP-BPSK modulator driven by binary data,polarization controller(PC),and polarizer.The DP-BPSK modulator driven by binary data without digital analog converter,making it structurally simple and easy to implement.To verify the feasibility of the proposed scheme,4-level pulse amplitude modulation(PAM-4)signals are generated using this scheme and transmitted over a 65km standard single-mode fiber(SSMF)at different data rates.The performance of these signals is evaluated based on the experimental results,including the eye diagrams and bit error rate(BER),which indicates that the transmitted signals have a high quality.Therefore,the proposed scheme has promising application potential in future short-distance optical communication.

关 键 词：多级调制1 偏振复用2 脉冲幅度调制3 光纤通信4 

分 类 号：TN913.7[电子电信—通信与信息系统]