OpticalCommunications光通信

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1、OpticalCommunicationsMembers:XiaoyuZhaoChenjiaoBaiFanfanLianQiaoliXuJunLiuYaoXuJunHuDefinitionTechnologyOpticaltransmitters/sourcesOpticalreceivers/detectorsAdvantagesTypicalopticalcommunicationsOpticalfibercommunicationsFree-spaceopticalcommunicationsApplicationsOverviewWhatareo

2、pticalcommunicationsanyformoftelecommunicationthatuseslightasthetransmissionmedium.consistsofatransmitter,achannelareceiverTechnologyOpticalSourcesLightEmittingDiode(LED)LaserFabry-PerotLaser(FP)DistributedFeedbackLaser(DFB)VerticalCavitySurfaceEmittingLaser(VCSEL)TechnologyOptic

3、alDetectorsAvalanchePhotodetector(APD)BettersensitivitythanPINdetectorTemperaturesensitiveDatarateto2.5GbpsP-I-DPhotodiode:Wideband800-1600nmHighdatarateupto100GbpsAdvantagesHighfrequencyShortwavelengthHightransparencyforelectromagneticradiationTypicalopticalcommunicationsOptical

4、fibercommunicationsFree-spaceopticalcommunicationsOpticalfibercommunicationduring1970s，thedevelopmentofextremelylow-lossopticalfibersTransmitinformationfromoneplacetoanotherbysendingpulsesoflightthroughanopticalfiberApplicationsTransmittelephonesignalsTransmitInternetcommunicatio

5、nTransmitcabletelevisionsignalsFree-spaceopticalcommunicationFree-space：air，outerspace，vacuum，orsomethingsimilarUseslightpropagatinginfreespacetotransmitdatafortelecommunicationsorcomputernetworkingApplicationsLAN-to-LANconnectionsoncampusesatFastEthernetorGigabitEthernetspeedsLA

6、N-to-LANconnectionsinacity,ametropolitanareanetworkConvergedVoice-Data-ConnectionTemporarynetworkinstallationThankyou!