欢迎来到三一办公! | 帮助中心 三一办公31ppt.com(应用文档模板下载平台)
三一办公
全部分类
  • 办公文档>
  • PPT模板>
  • 建筑/施工/环境>
  • 毕业设计>
  • 工程图纸>
  • 教育教学>
  • 素材源码>
  • 生活休闲>
  • 临时分类>
  • ImageVerifierCode 换一换
    首页 三一办公 > 资源分类 > PPT文档下载  

    100G技术中的光电器件.ppt

    • 资源ID:2903055       资源大小:4.36MB        全文页数:34页
    • 资源格式: PPT        下载积分:8金币
    快捷下载 游客一键下载
    会员登录下载
    三方登录下载: 微信开放平台登录 QQ登录  
    下载资源需要8金币
    邮箱/手机:
    温馨提示:
    用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)
    支付方式: 支付宝    微信支付   
    验证码:   换一换

    加入VIP免费专享
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    100G技术中的光电器件.ppt

    Xun Li,Department of Electrical and Computer,Engineering,McMaster University,Optoelectronic Devices for 100G,Technology,100G Market and Technology ReadinessTransmission Schemes and ComparisonsOptoelectronic Devices for DP-QPSK/DQPSK Systems,Optoelectronic Devices for OFDM SystemsConclusion,Outline,Definition of 100G technology,100G transport:long-distance communication links,withmetro,regional,and long-haul DWDM networks sending dataat 100 Gbps over several thousand km through existing10G/40G infrastructures,100G Ethernet:links among routers,servers,and switches indata-center environments over shorter distances up to 40 km,While both technologies involve different optical,components and network architectures,both are necessaryfor faster computer connectivity,speedier data transport,and increased bandwidth.,100G transport standards:the Optical Internetworking Forum,(http:/,100G Ethernet standards:in development by the IEEE,p802.3ba Task Force(http:/www.ieee.org/),100G Market and Technology Readiness,Increase in the volume of communicationtraffic comes from the spread of new,services such as cloud computing and on-line streaming,Qwest Communications internet traffic was,doubling every 16 months in 2008,Facebook needs 100Gbps core switching justto keep up with the millions of new Facebookusers being added each week to the current300 million active users,NYSE:needs 100Gpbs immediately,AMS-IX:peak traffic reaches 600Gpbs already,100G Market and Technology Readiness,Verizon has deployed the world 1st 100Gbpssystem over existing fibers originallyconditioned for 10Gpbs,100Gbps test bed has been established atGeorgia Institute of Technology(http:/www.100g.gatech.edu/),100G Market and Technology Readiness,Transition from 10G to 100G,Robustness against distortion 10G and 100G,about the same,Enabling technologies:,From OOK to QPSK/DQPSK-highest SNRtolerance,Polarization-multiplex-no improvement possibleCoherent detection and DSP-space forimprovement,More efficient FECs-space for improvement,100G Market and Technology Readiness,Choices on the implementation of 100G,WDM,single carrier,OFDM,High or low level constellations(high high spectra,efficiency,low symbol rate;low high noisetolerance,long transmission range),Star or square constellations(star better phasenoise tolerance,usually optimal in the sense that thedistance between the constellation points ismaximized for a given energy,but difficult to,modulate and demodulate;square better ASE noisetolerance,sub-optimal on the constellation pointdistance but easy to modulate and demodulate),Blind or pilot-assistant equalization,100G Market and Technology Readiness,In 100G systems/networks,chromatic dispersion(CD)increases 100 times,PMD increases 10times.Therefore,traditional OOK-DD schemewont work for,EDC reaches its limit in 10G systems already,hardware dispersion compensator has been installed in,fiber-links,The DWDM grid has been set at 50GHz,whichcannot accommodate the baseband of 100Gpbssignal in its original form,Photonic cross-connects(PXC)set up limit tobandwidth as well,Modulation scheme with higher bandwidthefficiency(e.g.,QAM)has to be introduced toreduce the 100Gbps signal transmissionbaseband,Transmission Schemes and Comparisons,WDM,i.e.,10 10Gpbs,low bandwidth efficiency,cost divide at N 10Gpbs scheme:N=4,Neither efficient,nor cost-effective in100G technology,Transmission Schemes and Comparisons,OFDM signal generation:,Transmission Schemes and Comparisons,Modulation QPSK,or other,f(t)e-jat F(+a)OFDM Transmitter,DeOFDM,Transmission Schemes and Comparisons,Demodulation QPSK,or otherOFDM Receiver,OFDM,Advantages:,easily adapt to severe channel conditions withoutcomplex equalization,robust against narrow-band co-channel interferencerobust against ISI,high spectra efficiency,efficient implementation through FFT,low sensitivity to time synchronization errors,tuned sub-channel receiver filters are not required(unlike conventional FDM),Transmission Schemes and Comparisons,OFDM,Disadvantages:,sensitive to fiber/device nonlinearity,sensitive to frequency synchronization problemshigh PAPR,need linear transmitter circuitry,which suffers frompoor power efficiency,loss of efficiency caused by cyclic prefix and/orguard interval,Transmission Schemes and Comparisons,OFDM Only suitable when the channelnonlinearity is negligible.Therefore,it is apromising technique for high data ratetransmission over short-range,e.g.,in100G Ethernet.,Transmission Schemes and Comparisons,Transmission Schemes and Comparisons,FECCD compensationPMD compensationElectrical equalizationCoherent detectionModulation format,Transmission Schemes and ComparisonsKey technologies involved:,Transmission Schemes and Comparisons,Transmission Schemes and Comparisons,DP-QPSK:,Developed on QPSK for mature 40G technology,Key feature in DP-QPSK modulation plusdigital-coherent-detection(DCD):,replace optical PLL by digital technology in,electronic domain,Transmission Schemes and Comparisons,Frequency stabilized,narrow linewidthDFB laser,Polarization rotator,controller,splitter/combiner,MZM,phase delay array,Optoelectronic Devices for DP-,QPSK/DQPSK Systems,Phase delay array,Optical time-domain Fourier transformer,Optoelectronic Devices for OFDM,Systems,*Frequency stabilization electricfeedback,*Linewidth narrowing optical feedback,DFB Laser,*Periodic symmetry break down*Curved waveguide,*Strongly confined waveguide,e.g.,SOI*SPP waveguideOther techniques,Polarization Rotator,Controller,Splitter/Combiner,Polarization Control in Waveguide,TM Mode with n21E1=n22E2,Cladding:area 2 with n2,Core:area 1 with n1Substrate:area 2 with n2TE Mode with E1=E2,Polarization Control in Waveguide,Polarization Control in Waveguide,Polarization Control in Waveguide,Polarization Control in Waveguide,Discrete schemes(DPD and PDP),*Integrated scheme,Optical Time-Domain Fourier Transformer,Quadratic phasemodulator,f(t),f(t)*exp(-jaLt2),f(t)*exp(-jaLt2)exp(jaLt2),f(t)*exp(-jaLt2)exp(jaLt2)*exp(-jaLt2),(/aL)F(t/2aL),Quadratic phase,f(t),modulatorf(t)exp(-jaLt2),f(t)exp(-jaLt2)*exp(jaLt2),(/aL)F(t/2aL),Quadratic phase,modulatorf(t)exp(-jaLt2)*exp(jaLt2)exp(-jaLt2),Optical Time-Domain Fourier TransformerTime Domain Fourier Transformer:Time Lens,Possible Applications of Time LensPulse compressionTime LensT-Switch and W-Demultiplexer Exchange,Time LensTime Lens,Time LensTime Lens,Possible Applications of Time LensDispersion Compensator,Time Lens,Time Lens,Phase Modulator,Long Haul Fiber TransmissionH()=exp-j(2L/2)2-j(3L/6)3h(t)=expj(2L/2)(t/2al)2+j(3L/6)(t/2al)3,f(t),f(t)*FH(),F(t)H(t),F(t),f(t),Possible Applications of Time LensDispersion Compensator,Time Lens,Long Haul Fiber Transmission,f(t),F(t),H()=exp-j(2L/2)2-j(3L/6)3Envelope DetectionTime Lensf(t)H(t)F(t)*h(t),f2(t),100G market is ready,Technology is getting mature,Working optical components currently arestill in discrete version,Great incentive on the evolution of opticalcomponents towards integrated version,Conclusion,

    注意事项

    本文(100G技术中的光电器件.ppt)为本站会员(laozhun)主动上传,三一办公仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知三一办公(点击联系客服),我们立即给予删除!

    温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。




    备案号:宁ICP备20000045号-2

    经营许可证:宁B2-20210002

    宁公网安备 64010402000987号

    三一办公
    收起
    展开