微环谐振器及其在全光信号处理中的应用分析-micro - ring resonator and its application in all-optical signal processing.docx

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2018-08-07 发布于上海
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微环谐振器及其在全光信号处理中的应用分析-micro - ring resonator and its application in all-optical signal processing.docx

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微环谐振器及其在全光信号处理中的应用分析-micro - ring resonator and its application in all-optical signal processing

characteristicsandsomeimportantparametersarederivedforbothall-passandadd/dropMRRs.Basedonthetheory,andassociatedwiththemethodsoffinite-differencetime-domain(FDTD),threedimensionalfullvectorialmode-matching(3DFVMM),andthreedimensionalcoupledmodetheory(3DCMT)inspace,thedesignofMRRisintroducedintheaspectsofcouplingcoefficient,aswellasdispersionandlossesofthebendingwaveguide.Thefabricationtechnicsofsiliconmiroringresonatorarealsostudied.Furthermore,theaccuracyofthedesignmethodisverifiedexperimentally.AbandwidthandwavelengthtunableOBPFbasedonsiliconadd/dropmicroring-MachZehnder(ADMRR-MZI)structureisproposedandfurtherdemonstratedforthefirsttimeonsilicon-on-insulator(SOI).ComparedwithasingleMRRwithtransmissionofLorentzian-shape,theproposeddeviceexhibitssignificantimprovementofshapefactorandextinctionration.Simultaneousbandwidthandwavelengthtunabilityin-bandripplecontrolisdemonstratedbythermallytuningtheresonanceoffsetbetweenthetwoMRRs.Basedonair-cladasymmetricaldirectionalcoupler,apolarizationdiversitychipwithpolarizationindependentthroughtransmissionofasinglemicroringisproposedanddemonstratedonSOIplatform.Comparedwiththepreviousschemes,thisproposalcanbefabricatedinasinglestepofexposureandetching,whichgreatlysimplifiesthecomplexityofthefabricationprocess.Only1dBpolarizationdependentlossisdemonstrated.Asignificantimprovementofthepolarizationdependenceisobtainedfor20Gbit/sNRZ-DPSKdemodulationusingthepolarizationdiversitycircuit.Additionally,usingthepolarizationdependencyofanormalsiliconMRR,apolarizationconverterbasedonintegratingtwoidenticalMRRsandaphaseshifterisproposedandanalyzedindetail.Bysimplytuningthephaseshifter,apolarizationconversionbetweenanytwooflinear,circular,andellipticpolarizationstatescanbeobtained.Theperformancesofthedeviceisdetaillydiscussedusing3DFVMMand3DCMT.。WDMapplicationsbasedonasingleMRRisstudiedtheoreticallyandexperimentally.First,RZ-NRZformatconversionbasedonMRRisdiscussedwithoptimizationsindetail.UsingtheperiodictransmissionofthefabricatedsiliconMR