简介：Thehigh-powerlaserbeaminthefinalopticsassemblyofhigh-powerlaserfacilitiesisoftenmodulatedbycontaminationparticles,whichmaycauselocalhighlightintensity,therebyincreasingthefilamentarydamageprobabilityforopticalcomponents.Tostudythegeneraldesignbasisforafinalopticsassemblytodecreasetheriskoffilamentarydamage,different-sizedcontaminationparticlesdepositedonacomponentsurfacearesimulatedtomodulatea351-nmlaserbeambasedontheopticaltransmissiontheory,andthecorrespondingsimulationresultsareanalyzedstatisticallyintermsofthepropagationcharacteristicandthelightfieldintensitydistributionofthemodulatedlaserbeam.Thestatisticalresultsshowthatcomponentthicknessanddistancebetweencomponentscantosomeextentbeoptimizedtoreducetheappearanceoflocalhighlightintensity,andthegeneraldesignbasisofcomponentthicknessandarrangementaregivenfordifferentcontrollevelsofparticlesizes.Moreover,thestatisticalresultscanalsopredictthelaserbeamqualityapproximatelyundertheexistingopticsdesignandenvironmentalcleanliness.Theoptimizeddesignforfinalopticsassemblybasedonenvironmentalcleanlinesslevelisusefultoprolongthelifetimeofopticsandenhancetheoutputpowerofhigh-powerlaserfacilities.
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