MEMS for Optical Fiber Communications-2

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1、EE539AIntegratedOpticsandOpticalMEMS7―OpticalMEMS:ApplicationsinOpticalFiberCommunications,PartIIOpticalCrossconnect(OpticalSwitch)LihY.Lin7b-2EE539APurpose:OpticalNetworkProvisioningInthecurrentcorenetwork,provisioningof2.5Gb/sor10Gb/sconnectionsisapaper-mediatedprocessthattakesweeksThisprocessshou

2、ldbeautomatedinresponsetoservice-layerrequestandachievesecondstominutesprovisioningtime.IProuterIProuterLihY.Lin7b-3EE539APurpose:OpticalNetworkRestorationCurrentcorenetwork:Basicrestorationequipment:DigitalelectroniccrossconnectsorSONETADMsBasicunitsofrestoration:45Mb/sor155Mb/sThereisanemergingnee

3、dtomovetolargerunitsofrestoration,atorapproachingthewavelengthlevelIProuterXIProuterLihY.Lin7b-4EE539AOpticalCrossconnectsforProvisioningandRestorationOpaquenetworkTransparentnetworkWavelengthWavelength...-interchange-selectiveStandard...interfacescrossconnect......crossconnect............OXC.......

4、.....SONETATMIPSONETATMIPRequirehigh-port-countopticalswitchesRequiremedium-port-countopticalswitchesLihY.Lin7b-5EE539A2-DMEMSDigitalCrossbarSwitchesVirtues:Simplebinarymirror-control.Preciseangularalignmentcanbeachievedeasily.Challenges:Scalability.32x32isprobablyareasonablelimitforsinglestage→Good

5、forwavelength-selectivecrossconnects.LihY.Lin7b-6EE539AExampleofMicro-actuatedSwitchMirrorCompacttranslation-to-free-rotationconversion22µmtranslation→90°rotationSwitchmirrorPushrodHingejointHingeActuatedtranslationstageLihY.Lin7b-7EE539AScratch-driveActuationFabricationWorkingprinciplePoly-2PSG-2PS

6、G-1SiN34Si∆X~10’sofnmSiLihY.Lin7b-8Akiyamaetal.,IEEEJ.ofMicroelectromechanicalSystems,1993.EE539A2-DMEMSOpticalSwitchingVideo
Uni-directionalactuation.Micro-mirrorpulledbackbysprings.
Bi-directionalactuation.Actuatorswithoppositemovingdirectionsareconnectedbyinsulatingmaterial.LihY.Lin7b-9EE539A8x8M

7、EMSOpticalSwitch•Lowloss(1.7dBfor8x8)•Negligiblecrosstalk(<-60dB)•Negligiblepolarization-dependentloss•Negligiblewavelength-dependence•Bit-ratetransparent•Sub-millisecondswitchingtime•Compact(1cmx1cm)