Output temporal contrast simulation of a large aperture high power short pulse laser system-中国期刊网

摘要 Theworkpresentedinthispaperisastudyofoutputtemporalcontrastdegradationbynear-fieldqualitydeterioration,suchasintensitymodulationandwavefrontdeviation,inalargeaperturehighpowershortpulselasersystem.AtwostepfocusingalgorithmwithacoordinatetransformbasedontheFresnelapproximationinthespacedomainisusedforsimulatingtheoutputfocusedbyanoff-axisparabolicmirror.Thetemporalcontrastdegradationbyintensitymodulationandwavefrontdeviationisanalyzedandtheinfluenceofthediameteronthetemporalcontrastdegradationisrevealed.ThesimulationandassumptionresultsbasedontheparametersoftheShenGuang-IIlasersystemarecomparedwiththeonlineexperimentaltemporalcontrastdata.Thenear-fieldqualitydeteriorationmightleadtotemporalcontrastdegradation,hinderinghighertemporalcontrastinlargeaperturehighpowershortpulselasersystems.

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Output temporal contrast simulation of a large aperture high power short pulse laser system

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Output temporal contrast simulation of a large aperture high power short pulse laser system

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