太赫兹终结本PPT课件

TerahertzRangeCommunication,ShaoxuanWangIVEM146100,1,.,3.AnexperimentofTHzcommunication,1.TheintroductionofTHz,2.TheapplicationsofTHz,Content,4.ThecommercialproductsofTHz,2,.,TheIntroductionofTHz,“Terahertzradiationoccupiesamiddlegroundbetweenmicrowavesandinfraredlightwaves，itsfrequencyrangeisfrom0.3THz3THz,wavelengthsofradiationintheterahertzbandcorrespondinglyrangefrom1mmto0.1mmandtechnologyforgeneratingandoperatingitisinitsinfancy，soitisaemergingdisciplineinthephysics.,Figure1:Thelocationofterahertzregioninelectromagneticspectrum1,classicaltransport,quantumtransition,3,.,Figure2.ApplicationofTHz6,4,.,THZImageofsecurity,Figure2：THzimaginginthesecurity7,5,.,THzapplicationinMedicine,Figure3：THzimagining（aandb)andabsorptioncoefficientimagesofthesamples:(candd)8,6,.,Xi-ChengZhangShortBiographyDr.ZhangwastheProfessorandActingHeadoftheDepartmentofPhysicsinUniversityofRochester,professorZhangsresearchinterestscenteraroundTerahertzwaves.Hisresearchisfocusedonthegeneration,detection,andapplicationsoffree-spaceTHzbeamswithultrafastoptics9.,JianquanYaoBiographyLaserandNon-LinearityExpert,DirectoroftheChineseOpticalSociety.ProfessorYaoJianquanhaslongbeenengagedintheresearchofnonlinearopticalfrequencylaserandconvertertechniques10.,7,.,Figure4:ThisisadiagramofTHzgenerator12,Cbandlaserisawavelengthbetween1530and1565nm11;UTC-PDisadevicethatcangenerateCWTHzradiationandmakethebestuseofthetelecom-basedtechnology(1550nm)16.,8,.,Figure5.0.14THz10Gbpswirelesscommunicationsystem12,Atfirstweencodethe10Gbpsdataatthetransmitter,thenthesignalismodulatedbythedeviceof16QAM,whichisadigitalmodulatedconversion.Finallythesignalisconvertedtoacarrierfrequencyof6GHzandthebandwidthof3.6GHz,andtheweusetheKaLogeneratortochangethesignalsfrequencyintoabout133.8GHz,thelastweemitthesignalbyaantenna.Thereceiverprocessisoppositetothetransmitter12.,9,.,Figure6:Performanceof0.14transmitterandreceiver10,Thecorecomponentoftransmitterandreceiveristhe0.14THzsub-harmonicmixer,whichisadevicebasedonSchottkydiode.,10,.,Figure8:500mdistance10Gbpstransmissiontest12,11,.,Figure9:500mdistance10Gbpswirelesscommunicationexperiment12,12,.,THzcommercialproducts,THztechnologywillhaveastrongcompetitiveedgeintheITfield.Fromnowon,therearemanycompaniesengagedinworkrelatedtothecommercializationofTHztechnologyintheworld.Forexample,theABMillimetercompanyofFrance13,theNTTcompanyofJapan14,andtheMicrotechcompanyoftheUS15arealltheleadersofTHzfield.Therearesomanycommercialproductswhichisproducedbythisthreecorporations,Thefollowingaretheirproducts.,13,.,TheproductsofABMillimeterCompany,Figure10:,600-1000GHzSubmillimeterwavesources15,ThesubteraherzsourceHG-wr1.2-FB-DHprovides0.001-0.01mWoutputpowerinthespectralrange660-1000GHz15,14,.,TheproductsofABMillimeterCompany,Figure11:MVNA-8-350VectorNetworkAnalysisSystem16,15,.,TheproductsofNTTCompany,Figure12:DeviceofNTTcompanyinTHzimaginingandcommunication16,16,.,TheproductsofNTTCompany,UTC-PD(uni-traveling-carrierphotodiode)photomixersareidealtogenerateCWTHzradiation,makingthebestuseofthetelecom-basedtechnology(1550nm).Two-typesofUTC-PDphotomixermodulesareavailable:awaveguide-coupledmodulesuitableforTHzcommunicationexperiments,andanantenna-integratedmodulewhichcanbeusedasradiationsourceforTHzspectroscopyandimaging16.,17,.,TheproductsofUSMicrotechInstruments,Figure13:THzdetector17,ThedetectorisdesignedforregistrationoftheTHzwave,asquarewavemodulationofwaveandasaw-toothofsignalvoltagefromthedetectorisproportionaltointensitytheintensityoftheradiation.Ablackfilterisfilledinthedetectortopreventthevisibleandinfraredwaves.,18,.,Figure14.TheparameteroftheTHzdetector,19,.,Conclusion,1.THzcanbeobtainedforthewirelesscommunicationtransmissionrateof10GB/s.Comparedwiththecurrentultrabroadbandtechnology,itishundredsorthousandsoftimesfasterthanultrabroadbandcommunication.2.Comparedtheinfrared-ray,italsohasaveryhighabilitytopenetratethefogandastrongclouddirectivity.ThismakesTHzbandwidthofthecommunicationcanbecarriedoutextremelyhighsecuritycommunicationsinharshenvironment.3.AlthoughtherearemanyadvantagesofTHzcommunicationsystem,therearealsohavesomanyconstraints,suchas,Lackofemissionsourceandthedetectoratroomtemperature;THzsignalmodulationandprocessingareremainsthefocusofstudy.,20,.,References,1X.-C.Zhang,CenterforTHzResearchRensselaerPolytechnicInstitute,USA.“ResentProgressforTHzScience&Technology(PPT)”20/11/20142.K.Namjou,S.Chai,E.A.Whittaker,J.Faist,C.Gmachl,F,capasso,D.L.Sivco,andA.Y.Cho.Sensitiveabsorptionspectroscopywitharoom-temperaturedistributed-feedbackquatum-cascadelaser.OpticsLetters,23(3):219-221,February19983J.F.Federici,B.Schulkin,F.Huang,D.Gary,R.Barat,F.Oliveira,andD.Zimdar.THzimagingandsensingforsecurityapplicationsexplosive,weaponsanddrugs.SemiconductorScienceandTechnology,20054.A.Y.Pawar,D,D,Sonawane,K.B.Eranade,andD.V.Derle.Terhertztechnologyanditsapplications.DrugInventionToday,5:157-163,20135ReenoReeder,DevelopmentandOptimisationofModellingMethodsandAlgorithmsforTerahertzRangeRaduationSourcesbasedonQuantumWellHeterostructures.ISBN978-9949-23-609-120146Jian-quanYao,ProfessorandDirector,InstituteofLaser&Opto-electronics,TianjinUniversity,“THz-TechnologyandItsApplicationForeground(PPT)”,07/09/20087FaustinoWahaiaa,GintarasValusisb,LuisM.Bernardoa,AblioAlmeidaa,JoaquimA.Moreiraa,PatriciaC.Lopesa,JanMacutkevicb,IrmantasKasalynasb,DaliusSeliutab,RamunasAdomaviciusb,RuiHenriquec,MachadoLopesd“Detectionofcoloncancerbyterahertztechniques”,”JournalofMolecularStructure”.Volume1006,Issues13,14December2011,Pages7782,21,.,8StphaneB