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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