马赫曾德尔干涉仪瞬态干涉条纹采集技术及其在激光等离子体测试中(3)

2020-11-27 11:43

Abstract硕士论文

Abstract

Laserplasmahasbroadapplicationprospectsandthereforetheresearchonlaserplasma

hasimportantsignificance.The

onmainpurposeofthispaperistodeveloptransientfringeinterferenceacquisitiontechniquebasedMath—Zehnderinterferometer,obtainhigh-quality

fringesoflaserplasma,andreconstructwave-frontoftransientinterferencefringes.

Thispaperdescribesandcomparesthevariousdiagnosticmethods.Quantitative

three-dimensionaldistributionoflaserplasmaparametersCanbeobtainedonlythroughthree.dimensionalreconstructionmethodininterferencewhichisthebestlaserplasmadiagnosticmethod.However,sincethebeginningoftheprocessofdevelopmentoflaserplasmaexpansionspeedisveryfast,togetclearinterferencefringesoflaserplasmaiscriticalproblemusingshortpulselaser.

Thispaperdevelopsinterference

Zehnderinterferencesystem.ThefringesacquisitiontechniquebasedonatheMach—adjustmentmethodbyequalopticalpathsofMach—Zehnderinterferometerisproposed.Whitelightisusedtoverifytheextentofshortcoherence.ThentheprincipletoacquiretransientinterferencefringesbyCCDisanalyzed,meanwhile,asoftware.basedcontroloftheCCDacquisitionmethodoftransientinterferencefringesisproposed.Itisprovedthathigh—quality

throughsoftware-basedCCD.interferencefringesareobtainedinexperiment

Comparedtheinterferencefringesoflaserplasmaobtainedbytheestablished

Mach—Zehnderinterferometer、^,itllthoseobtainedbytraditionalMach-Zehnderinterferometer,itisprovedthattheexperimentalequipmentisreliable.

Finally,FFTmethodisappliedtoreconstructwavefrontoftheinterferencefringesof

laserplasma.ComparetheeffectsusingtwodifferentFFTmethodsand

whytheyaffectthequalityofinterferencefringesoflaserplasmaonanalyzethereasonsthereconslructionresults.Program

basedonisusedtoprocessdifferentinterferenceimagesandthequalityofinterferenceonfringeshaseffectthereconstructionresults.ThisillustratestransientacquisitiontechniquestrictlyequalopticalpathoftwoalmsofMach-ZehnderinterferometerCangreatlyimproveinterferencefringesandwavefrontreconstructionresults.

fringesobtainedinthispaperwilllayaThehighqualityinterference

etc.)solidfoundationforthefollow-upwork(processofinterferencefringe,acquisitionoflaserplasmaparameters,

Keywords:laserplasma,interferencediagnosis,Mach-Zehnder

acquisition,CCDinterferometer,image


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