简介:Anultra-highspeed1:2demultiplexerforopticalfibercommunicationsystemsisdesignedutilizingtheIHP0.25μmSiGeBiCMOStechnology.Thelatchofthedemultiplexercorecircuitisresearched.Basedonthecurrentmeasurementcondition,ahigh-gainandwide-bandwidthclockbufferisdesignedtodrivelargeload.Transmissionlinetheoryforultra-highspeedcircuitsisusedtodesignmatchingnetworktosolvethematchingproblemamongtheinput,outputandinternalsignals.Thetransientanalysisshowsthatthisdemultiplexercandemultiplexone100Gb/sinputintotwo50Gb/soutputs.Thechipareaofitis0.7mm×0.47mm,theinputandoutputdataarebothat400mVP-PPCMLstandardvoltagelevel,andthepowerconsumptionoftheICis900mWatthepowersupplyof-4V.
简介:S乐队获得从1488nm与带宽弄平分布式的纤维拉曼放大器到1541nm(在宽度的53nm),10dB的平均获得和卤0.6dB的获得涟漪成功地被获得,在哪个当泵和啁啾的纤维布拉格栅栏被用作变平的获得,有1427.2nm的波长的单个波长的高力量纤维拉曼激光被使用过滤器。而且,过滤波长分割更复合(FWDM)被用作更复合的多信号和1427nm/1505nm粗糙的波长分割更复合(CWDM)被用作泵信号coupler。获得媒介是在长度和在长度的5km的分散赔偿纤维(DCF)的50km的G652纤维。而且,获得变平引起的纤维和效果的不同类型的地点安排象他们的答案一样过滤详细被讨论。扩大光纤维通讯乐队的范围并且为特别增加纤维通讯的能力是很重要的极端长拖并且超离频能力通讯系统。CLC数字TN253文件代码A这个工作被浙江省的大科学研究工程支持,P.R。中国(号码021101558)和科技的部,工程的部分朝鲜中国光技术研究中心资助的朝鲜。
简介:Inthispaper,awavelengthdivisionmultiplexing(WDM)transmissionsystemderivedfromthecoherentopticalorthogonalfrequencydivisionmultiplexing(CO-OFDM)withpolarizationdivisionmultiplexing(PDM)and16-orderquadratureamplitudemodulation(QAM)isstudied.Asimulationof80-channelWDMtransmissionsystemwithdatarateof200Gbit/sisbuilt,andthetransmissionperformanceofthesystemisanalyzed.ThesimulationresultsshowthatthesystemQvalueoftheWDMchannelsat16Tbit/swithaspectralefficiencyof7.14bit/s/Hzispotentiallyover10.0dBforalonghaultransmissionupto1800kminastandardsingle-modefiber.
简介:AnewS-typeoferbium-ytterbiumco-dopedphosphateglasswaveguideamplifierintegratedwithcascadedmultilayermediumthinfilmfilterisproposed,thisS-typegeometrywaveguidestructureisusedtoachievealongpathinacompactchip,andobtainedhighergainwithlowerEr-dopedconcentration.Thecascadedmultilayermediumthinfilmfilterisutilizedtoachieveabroaderflatteninggainbandwidth.Theintrinsicalgainspectrumisobtainedbysolvingrateandpowerpropagationequations,theeffectoftransmittancespectrumofthinfilmfilteronflatteninggainisdiscussed.