一种RFOG网络光拍频干扰噪声优化方案  

An Optimization Scheme of Optical Beat Interference Noise in RFOG Network

作　　者：张速飞 ZHANG Sufei(Zhejiang BC&TV Technology Co.,Ltd,Key Laboratory of Cable DTV Network Technology of Zhejiang Province,Hangzhou 310012,China)

机构地区：[1]浙江省广电科技股份有限公司浙江省有线数字电视网络技术重点实验室

出　　处：《测试技术学报》2019年第5期456-460,共5页Journal of Test and Measurement Technology

摘　　要：光拍频干扰噪声(OBI)降低了网络的载噪比,严重劣化了系统的性能,因此必须加以抑制.本文提出了RFOG网络光拍频干扰噪声优化方案,通过激光器类型选择、光发射波长选择、隔离度指标优化等技术创新,改善和消除网络因拓展上行传输带宽而产生的光拍频干扰,为基于Docsis3.0/3.1的多信道回传时产生的网络光拍频干扰噪声问题提供解决方案.通过搭建网络试验平台进行测试,仿真结果表明该方案与优化前的方案相比,网络的NPR指标更好,光拍频干扰噪声更小.Optical beat interference noise(OBI)reduces CNR of the network and seriously degrades the performance of the system,so it must be suppressed.An optimized scheme of OBI in RFOG network has been proposed in this paper.Through using innovative technology such as the selection of lasers,the wavelength selection of emitted light and Isolation index optimization,the system reduce OBI of network that caused by expanding uplink transmission bandwidth.It has provided a solution to OBI generated during the multi-channel transmission based on docsis 3.0/3.1.By setting up a network test platform and testing,Simulation results show that the NPR index using the optimization scheme would be better and OBI would be lower,compared with the un-optimization scheme.

关 键 词：RFOG 光拍频干扰噪声 NPR CWDM 激光器 

分 类 号：TN943.6[电子电信—信号与信息处理]