简介:Opticaltimedivisonmultiplexing(OTDM)isoneofthepromisinigwaysforthefuturehigh-speedopticalfibercommunicationnetworks.All-opticalswitchis,beingoneofthecoretechnologiesofOTDMsystemsandnetorks,crucialtorealizethevaroussignalprocessesincludingtime-divisiondemultiplexing,packerswitching,all-opticalregeneratingandsoon.Thisthesismainlystudiesvariousall-opticalswitchtechnologiesandtheirutilizationinthefieldsofall-opticalsignalprocessingsintheOTDMsystemsandnetworks.Themainjobsarelistedasfollows.(1)Anovelall-opticalultrafastdemultiplexingschemeusingthesolitonself-trappingeffectinbirefringentfiberisproposed.(2)ThedemultiplexingperformanceoftheNonlinearOPticalLoopMirror(NOLM)isthoroughlyanalyzedanditsoptimizationisfurtherdiscussed.(3)Theperformanceanalysisandtheconfigurationoptimizationoftheall-opticalswitchesbasedontheSemiconductorOpticalAmplifier(SOA)aresystematicallypresented.Thespeedlimitationoftheall-opticalSOAswitchesinducedbythefastgaindepletionofSOAisdiscussed,Besides,anovelSOAswitchisproposed,whichadoptstheasymmetricMach-ZehnderInterferomerterconfiguration.(4)The8×2.5Gb/sOTDMexperimentaltransmissionsystemalong105kmstandardfiberisrealizedusingtheNOLMdemultiplexer.(5)TheNOLMswitchisusedtorealizetheall-optical3Rregenerationof2.5G/sReturn-to-Zerosignal.(6)ThefeasibilityandlimitationoftheallopticalSOApacketswitchisdiscussed.AndadevelopedMZIconfigurationofSOApacketswitchisfurthershowntoimprovethepackerswitchingperformance.Finally,anall-opticalpacketdroppingnodesuitableinthenetworkswithringorbusconfingurationandanall-opticalpacketswithcingnodeintheShuffleNetnetworksareproposedtoshowthefeasibilityofall-opticalpacketswitchingthroughcombiningtheall-opticalswitchesandthereasonablelogicdecisions.
简介:这篇文章介绍一个L1乐队低噪音用0.18m互补金属氧化物半导体技术的综合全球放系统(GPS)接收装置薄片。与双变换一低--如果建筑学被用于这GPS接收装置。接收装置由低噪音放大器(LNA)组成,下面变换混合器,乐队通行证过滤器,收到的信号力量指示物,可变获得放大器,可编程的获得放大器,模数转换器,PLL频率合成器和其它给块调音。接收装置完成105dB和噪音数字的最大的获得不到6dB。可变获得放大器(VGA)和可编程的获得放大器(针网阵列)提供获得控制在50dB上的动态范围。当包括ESDI/O垫占据2.9mm2薄片区域时,接收装置从1.8V供应消费不到160mW。