Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits-中国期刊网

摘要 Vortexbeamswithfractionaltopologicalcharge(FTC)havemanyspecialcharacteristicsandnovelapplications.However,oneoftheobstaclesfortheirapplicationisthedifficultyofpreciselydeterminingtheFTCoffractionalvortexbeams.WefindthatwhenavortexbeamwithanFTCilluminatesadynamicangulardoubleslit(ADS),thefar-fieldinterferencepatternsthatincludetheinformationoftheFTCofthebeamattheangularbisectordirectionoftheADSvaryperiodically.Basedonthisproperty,asimpledynamicADSdeviceanddatafittingmethodcanbeusedtopreciselymeasuretheFTCofavortexlightbeamwithanerroroflessthan5%.

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Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits

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Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits

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