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基于双微环结构的MZI型波长交错滤波器（英文）.docx

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基于双微环结构的MZI型波长交错滤波器（英文） Title:DualMicroring-EnhancedMZI-basedWavelength-InterleavedFilter Abstract: Wavelength-divisionmultiplexing(WDM)isakeytechnologyinmodernopticalcommunicationsystems,providingthecapabilitytotransmitmultiplechannelsofinformationsimultaneouslyoverasingleopticalfiber.WDMfiltersplayacrucialroleinseparatingandcombiningthesedifferentwavelengthchannels.Inthispaper,weproposeanoveldesignofawavelength-interleavedfilterbasedonadualmicroring-enhancedMach-ZehnderInterferometer(MZI). Introduction: ThedemandforhigherdatatransmissionratesinopticalcommunicationsystemshasledtothedevelopmentofWDMtechnology.WDMallowsmultiplewavelengthstobetransmittedoverasinglefiber,significantlyincreasingtheoverallcapacity.VarioustypesofWDMfiltershavebeendevelopedtoseparateandcombinedifferentwavelengthchannels.Amongthem,theMach-ZehnderInterferometer(MZI)iswidelyusedduetoitssimplicityandversatility. However,conventionalMZIssufferfromlimitedchannelspacingandhighinsertionloss.Toovercometheselimitations,weproposeanoveldesignthatincorporatesdualmicroringsintotheMZIstructure.Thedualmicroringsserveasresonators,enhancingthefilteringcapabilitiesofthedeviceandenablinglargerchannelspacing. DesignandFabrication: Theproposeddualmicroring-enhancedMZIconsistsofaMach-ZehnderInterferometerwithtwoadjacentmicroringsplacedatstrategicpositions.Theopticalsignalissplitintotwoarms,withonearmpassingthroughtheuppermicroringandtheotherthroughthelowermicroring.Themicroringsactasresonators,selectivelydroppingortransmittingspecificwavelengths. Thedeviceisfabricatedusingstandardsilicon-on-insulator(SOI)technology.Thewaveguidesandringsaredefinedusingelectronbeamlithography,andthestructureisetchedintotheSOIsubstrateusingreactiveionetching.Finally,thedeviceispassivated,andtheinputandoutputfibersarealignedandbondedtothechip. PerformanceAnalysis: Theproposeddualmicroring-enhancedMZIoffersseveraladvantagesoverconventionalMZIs.Firstly,itenableslargerchannelspacing,reducingthecomplexityandcostofwavelengthdivisionmulti