基于MEMS技術的波長選擇開關研究.pdf

1、華中科技大學碩士學位論文基于MEMS技術的波長選擇開關研究姓名：宛政文申請學位級別：碩士專業(yè)：光學工程指導教師：萬助軍201105華中科技大學碩士學位論文華中科技大學碩士學位論文IIAbstractWiththedevelopmentofopticalcommunicationespeciallythewideapplicationsofdensewavelengthdivisionmultiplexing(DWDM)technolog

2、ytechnologiessuchasopticalcrossconnection(OXC)reconfigurableopticaladdmultiplexer(ROADM)areattractingmemeattention.Wavelengthiveswitch(WSS)isacterizedbyfreeswitchingofindividualwavelengthwhichenablesitasanimptantpartinab

3、ovetwotechnologiesthusbecamesaglobalresearchfocusinopticalcommunication.ThepresenttypicalstructuresfaWSSwereintroducedtherespectiveacteristicswereanalyzedcompared.AnewWSSstructurebasedonMEMS(microelectromechanicalsystem)

4、technologywaspresented.AtransmittingphasegratingaMEMSmirrarraywereemployedasthewavelengthdispersiingbeamcontrollingelementsrespectively.Thetwoelementswerelocatedonthefrontrearfocalplaneofaresolutionlenswhichconstructsa2f

5、opticalsystem.Anopticalfibercollimatarraywasemployedastheinputoutputpts.Theopticalbeamisfirstexpedbyaprismgroupthenincidentsonthegratingthustheresolvingpowerofthegratingisimproved.IndertoreducetheWSSsizeamirrasteeringpri

6、smwereemployedtofoldtheopticalpath.Thefmulatocalculatethepowercouplingefficiencyofthefundamentalmodegaussianbeamwasdevelopedbasedonwaveopticstheythusthepassbundergivenmirrarrayparameterssuchasfillingratiobeamconfiningfac

7、twasobtained.TherelationshipamongtheangulardispersionofthegratingthefocallengthoftheresolutionlensthechannelspacingthepitchoftheMEMSmirrarraywasanalyzed.Thebeamexpingratiooftheprismgroupwasdeducedunderagivenprismanglebea

8、mincidentangle.ThetransfmingmatchingofGaussianfieldintheopticalsystemwereanslyzedinemphasis.ThepowerlossresultingfrommismatchofGaussianfieldwasstudied.TheseanalysesaremostimptantftheWSSdesignopticaladjustment.Basedonabov

9、eanalysestheelementsftheWSSweredesignedfabricatedda14WSSwasassembled.Thedevicespecificationsweretested.Theionlossis5.08dBthecrosstalkbetweenptsis45dBthepolarizationdependentlossis0.186dB.TheresultsshowthatthedesignedWSSi