贝塞尔光束简介

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1、BesselBeam牛丽婷20141030Page1Page2OutlineBesselbeam基本介绍论文概要问题讨论Page3OutlineBessel基本介绍论文概要问题讨论Page4特种光束之间变换Page5l=3常用参数和公式Page6Bessel基本介绍论文概要问题讨论Page7Highqualityquasi-Besselbeamgeneratedbyround-tipaxiconPage8perfectaxicon产生的QBBTheintensityprofilealongthepropagationa

2、xisisshowntogetherwithinvariantshapeoftheradialprofileattwoaxialpositionsz1andz2Page9InfluenceoftheroundaxicontipNewwaverefractedbytheroundtippropagatesbehindtheaxiconandinterfereswiththeQBB.Thisresultsinaxialmodulationoftheopticalintensitywithaperiodλ/(1−cosα0),

3、whereλisthewavewavelengthinthemedium.Duetotheinterferencetheradialintensitydistributionisnolongerinvariant(seeexamplesatz1andz2).Page10如何消除round-tipaxicon对QBB的调制Page11实验装置ThedemagnifyingtelescopeismainlyusedforgenerationofnarrowhighintensityQBBPage12Anexampleofsu

4、chbeampropagationbehindtheperfectaxiconandthroughsuchatelescopeisshowninFig3.Thewhitecurvesshowthenumericallycalculatedaxialintensityprofiles.光路Page13thespatialintensitydistributionwithandwithoutconsideredfiltersItcanbeseenthatthefiltrationdoesnotgivethesameaxial

5、intensityprofileastheidealQBBandthetotalpowerinthebeamdecreases.Howeverfiltersofradiilargerthan2138μmprovideslowlyvaryingaxialintensityprofileswithoutanyoscillationsoveradistanceof2/3zmax.去除振荡Page14Bessel基本介绍论文概要问题讨论Page15