磁光四波混频理论与其应用分析

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1、ABSTRACTABSTRACTMagneto-opticalnonlinearfibers,asaclassofspecialfibers,possessthemagneto-opticalandnonlineareffectsatthesametime.Thecoupled-modetheoryforguidedopticalwavesinthemagneto-opticalnonlinearfibershasanpracticalsignificancefordesigninganddevelopingthemagneticallycontrolledo

2、pticalfiberinformationprocessingdevices.Theresearchworksareasfollows:1.Accordingtotheperturbationtheoryforguidedopticalwaves,withthemagneto-opticandnonlineareffectsasperturbation,thecoupled-modeequationsforthedegenerateandnon-degeneratemagneto-opticalfour-wavemixing(MO-FWM)arederive

3、d.Theparametricprocessesintheisotropicmagneto-opticalnonlinearfiberareanalyticallyinvestigated,andthephasematchingconditioncanbemagneticallycontrolledbymeansofthewavelengthdependenceofthemagneto-opticcouplingcoefficient.2.Theinfluenceofthemagneto-opticaleffectonfourwavemixingisexper

4、imentallyinvestigated,andthepolarizationdependencyofFWMisalsomeasured.ItisshownthatthemagneticcontrollabilityofFWMcanbeidentifiedeasilyforthecasewithorthogonalstatesofpolarization.TheMO-FWMeffectcanalsobeappliedtomagneticfieldmeasurementinthedifferentoperatingrange.TheFWMefficiencyc

5、anbefurtherimprovedunderanappropriatebiasmagneticfield.3.InthecasethatthewavelengthdependencyoffiberVerdetconstantisnegligible,themagneticcontrolcharacteristicsoffiberparametricgainareanalyzedfortheleft-handedcircularpolarizationincidenttothebirefringentfiber.Thenecessityofusingmagn

6、eto-opticandnonlinearfiberwithhighVerdetconstantintheexperimentsispointedout.Themaximalparametricgaincanbeobtainedbyoptimizingthemagnitudeoffiberbirefringence,andthemagneticadjustabilityofparametricgaincanbeimprovedbyappropriatelychoosingfiberlength,pumppowerandopticalstatesofpolari

7、zation.4.Forthecasewithorthogonalstatesofpolarization,thedependenceofFWMonthenon-uniformmagneticfieldof"unipolar"or"bipolar"distributionarerespectivelyII万方数据ABSTRACTstudied,especiallyfortheinfluenceofthedutyratioofmagneticfield.KeyWords:four-wavemixing,magneto-opticaleffect,signalga

8、in,magneto-opticaln