Postprocessing treatments to improve the laser damage resistance of fused silica optical surfaces and SiO2 coatings-中国Betway体育网页登陆

摘要 Thecombinationofdeepwetetchingandamagneto-rheologicalfinishing(MRF)processisinvestigatedtosimultaneouslyimprovelaserdamageresistanceofafused-silicasurfaceat355nm.ThesubsequentlydepositedSiO2coatingsareresearchedtoclarifytheimpactofsubstratefinishingtechnologyonthecoatings.Itisrevealedthatadeepremovalproceedingfromthesinglesideordoublesidehadasignificantimpactonthelaser-induceddamagethreshold(LIDT)ofthefusedsilica,especiallyfortherearsurface.Afterthedeepetching,theMRFprocessthatfolloweddoesnotactuallyincreasetheLIDT,butitdoesamelioratethesurfacequalitieswithoutadditionalLIDTdegradation.Thecombinationguaranteeboththeintegrityofthesurface’sfinishandthelaserdamageresistanceofthefusedsilicaandsubsequentSiO2coatings.

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Postprocessing treatments to improve the laser damage resistance of fused silica optical surfaces and SiO2 coatings

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