Super-PON系统中SRS串扰的仿真分析  

Simulation Analysis of SRS Crosstalk in Super-PON System

作　　者：于培华 李正璇 许岩 宋英雄 Yu Peihua;Li Zhengxuan;Xu Yan;Song Yingxiong(Key Laboratory of Specialty Fiber and Optical Access Networks,School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学通信与信息工程学院特种光纤与光接入网重点实验室,上海200444

出　　处：《中国激光》2022年第3期73-82,共10页Chinese Journal of Lasers

基　　金：上海市科委基金(20511102400,20ZR1420900);111项目基金(D20031)。

摘　　要：超无源光网络(Super-PON)凭借低成本、长距离传输、支持大量用户等优点逐渐成为研究热点。然而,在多波长长距离传输系统中,Super-PON上下行之间及Super-PON与以太网无源光网络(EPON)、10G以太网无源光网络(10G-EPON)系统共存时,皆面临着受激拉曼散射(SRS)串扰的挑战。因此,为了满足Super-PON系统的高链路预算需求,通过VPI仿真软件分别测量了在上述各种组合方式下系统所受到的SRS串扰。结果表明:将C波段作为下行并将L波段作为上行进行传输时,信号所受到的功率损伤最小,为0.43 dB(上下行单波长入射光功率分别为10 dBm和13 dBm),因此这是Super-PON系统的最佳波段分配方案。此外,当Super-PON与EPON上行、10G-EPON下行系统共存时,SRS效应给它们带来的影响很小,基本可以忽略不计。Objective Super-passive optical network(Super-PON)has gradually become a hot topic due to its advantages of low cost,long-distance transmission,and supporting a large number of users.While in the multi-wavelength and longdistance transmission system,the upstream(US)and downstream(DS)of the Super-PON system which coexists with Ethernet passive optical network(EPON)and 10G-EPON systems are all confronted with the challenge of stimulated Raman scattering(SRS)effect.The SRS effect causes a transfer of energy from the shorter wavelengths(pump channels)to the longer wavelengths(Stokes channels)when multiple wavelengths are simultaneously transmitted in the standard single mode fiber(SSMF),which reduces the transmission performance of the system.Therefore,in order to satisfy the high power budget requirement of the Super-PON system,the VPI simulation software is adopted to measure the SRS crosstalk of systems under the above combinations.Methods Due to the high input power involved,the stimulated Brillouin scattering(SBS)effect can affect the transmission performance of the Super-PON system.Firstly,in order to accurately measure the power impairment of signals caused by the SRS effect,the threshold optical power of SBS is measured by an experiment,which is 13 dBm.Second,in the Super-PON system,the total number of wavelengths of US and DS is 32.Owing to the limitation of experimental conditions,the influence of SRS effect on 10 Gbit/s non-return-to-zero(NRZ)signals through a 50 km SSMF transmission system is investigated by simulation where the following two cases are considered.The one case is using C-band for US and L-band for DS,and the other case is using C-band for DS and L-band for US.In the Super-PON system,the significant difference between US and DS transmissions is that the DS signals are first amplified by an erbium-doped fiber amplifier(EDFA)and then transmitted through a 50 km SSMF,while the US signals are first transmitted through a 50 km SSMF and then amplified.Finally,when the Super-PON US and DS coexist

关 键 词：光通信 受激拉曼散射 超无源光网络 以太网无源光网络 功率损伤 

分 类 号：O437.3[机械工程—光学工程]