多芯光子晶體光纖寬帶耦合器的研究和設(shè)計.pdf

1、安徽大學(xué)碩士學(xué)位論文多芯光子晶體光纖寬帶耦合器的研究和設(shè)計姓名：陶大時申請學(xué)位級別：碩士專業(yè)：光學(xué)指導(dǎo)教師：徐峰201005IIAbstractAbstractWiththerapiddevelopmentofopticalfibercommunicationopticalfibersensingtechnologyopticalfiberCATVLANOpticalAccesswksprecisiontestingsystemsthe

2、demofcouplersisincreasingespeciallythebroadbcouplers.Photoniccrystalfiber(PCF)offerapossibledesignfvariousopticaldeviceswhichexhibitsadvancedfeaturesflexiblydesign.NowtheresearchonPCFcouplerisafocus.ThePCFcouplerhasmanya

3、dvantagessuchasinsensitivetothepolarizationtheshtcouplinglengththefeatherofwavelengthflatted.Inthebeginningtheconceptofphotoniccrystalfiberisproposed.photoniccrystalfiberisanewgenerationopticalfiberwhichisbasedonphotonic

4、crystaltechnology.ComparedtoconventionalopticalfiberPCFshowslotsoffeaturessuchasnocutoffmodetransmissioncontrolleddispersionnonlinearityhighflexibilityetc..ThentheyofthePCFcouplerisdiscussedanalyzeditprovideatheeticalbas

5、isfthedesignofPCFbroadbcoupler.ThefollowedisabriefintroductionfseveralnumericalsimulationmethodofPCF.Suchasplanewaveexpansionmethodeffectiveindexmethodsupercelllatticemethodfinitedifferencemethodfiniteelementmethodbeampr

6、opagationmethodinadditionthesoftwareofMatlabiginthatusedinthepaperisintroduced.OnthisbasisthispaperpresentanoptimizeddesignfdualcefluinedopedPCFcouplerthemethodisusingasymmetricstructurefanasymmetricstructure.Thepapermai

7、nlyusethebeampropagationmethodtosimulatePCFcouplers.Theresultsshowsthatthecouplingrationissteadyat50%0.5%whichexhibitagoodfeatherofwavelengthflatted.Inadditionthiscouplerhastheacteristicofashtcouplinglengthinsensitivetot