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1、IntegratedDesignToolforFiber-OpticAnalogLinksP.Tommasino,A.Trifiletti,andA.VannucciDipartimentodiIngegneriadell’Informazione,ElettronicaeTelecomunicazioni,UniversitàdiRoma“LaSapienza”,ViaEudossiana,18,I-00184,Rome,ItalyAbstract—Anintegratedtoolfortheanalys
2、isanddesignofopticalanaloglinksisproposed,inordertopermitoptimizationofjointperformanceofthemodulatorandofitselectricaldriverwithinaII.THEMACH-ZEHNDERMODULATORMODELmicrowavecircuitalCAD.ThetoolcomprisesacircuitalmodeloftheMach-Zehndermodulator,andaFEMsimul
3、atorforThemodelfora10Gb/sMZMwithoveralllengthL0formodulatordesignfromagivenphysicalandgeometricaltheopticalpathwasproposedin[7].Theblockschemeisstructure.AcasestudyofdesignandanalysisofabroadbandlinkshowninFig.1.operatingatfrequenciesashighas35GHzispresent
4、ed,toillustrateadvantagesoftheproposedtool.Keywords—nonlinearopticaldevices;electroopticmodulators;opticaltransmitters,opticalmodulation.I.INTRODUCTIONThetransmissionofbroadbandanalogAMsignalsperformedthroughhighbandwidthfiberopticlinksisrequiredinseverala
5、pplicationssuchasbroadbandwirelessaccessFigure1.TheMach-Zehndermodulatormodel.networks,sensornetworks,radar,satellitecommunicationsandwarfaresystems.LonghaulfiberopticlinkarecurrentlywellTheMZMmodelhasbeenthenextendedupto40GHzandusedtodesignadriverfor40Gb/
6、sdigitallinks(see[8]).establishedincabletelevision(CATV)industry[1]andThemodelforRFpathisdividedintothreemainblocks,availablesincemanyyearsinthemarket.RadiooverFiberrepresentedbytheirS-parametermatrices.Theinputblock(RoF)systemsforwirelesscommunication[2]-
7、[4]areallowsdescriptionofRFsignalpropagationwithinthetaperinvestigatedasanalternativeinfuturebroadbandwirelessusedtofeedtheL-lengthactivepartoftheMZM(i.e.thearchitectures.Nextgenerationsofmulti–roleradarformilitarysectionwheretheelectroopticinteractiontake
8、splace);theandspaceapplicationsinvolvehighdemandingantennaoutputblockaccountsforsignalpropagationwithintheloadedremoting[5]basedonhighbandwidthhighperformancesfiberoutputtaper.Thepropagationintotheactivesecti