45256.光波相位不連續(xù)點(diǎn)及閃爍的測(cè)量研究

1、中國(guó)科學(xué)院合肥物質(zhì)科學(xué)研究院碩士學(xué)位論文光波相位不連續(xù)點(diǎn)及閃爍的測(cè)量研究姓名：程?hào)|杰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：光學(xué)指導(dǎo)教師：范承玉20080501AbstractTheDetectionofBranchPointsandScintiUationDongjieCheng(Optics)Directedby：ChengyuFanAbstractAlaserbeampropagatinginatmosphere，hasshownthatunde

2、rstrongturbulenceeffectswherescintillationissignificantacontinuousphasefunctiondoesnotingeneralexist，owingtothepresenceofbranchpointsinphaseThestrongscintillationcouldinducedegradationoftheperformanceofadaptiveopticssyst

3、emwhenitisusedtocompensateatmosphericturbulenceThoughtherehavebeensometheoreticalstudiesonbranchpoints，itisnecessarytostudyonthebranchpointsproblemexperimentallyinordertogainamoreclearunderstandingofbranchpointsUsing30x3

4、0Hartmannshackwavefrontsensorbranchpointsinapropagatinglengthoflkmisdetected，andtheexperimentalresultsiscomparedwiththesimulationdataThen，usingthefourdimensioncodeoflaserpropagatinginatmosphere，thefactors(eg，emissiondiam

5、eterandgridprecision)affectingtheamountdensityofbranchpointsissimulatedLastlyexperimentonthescintillationofGaussbeaminweakturbulenceiscarriedoutAsfollows，someofouroriginalresultsareshownrespectively，1Branchpointsaredetec

6、tedinourexperimentwithpropagatinglengthoflkmUsingthefour—dimensioncodeoflaserpropagatinginatmosphere，undertheexperimentalcondition，simulationisperformedThesimulationresultiscomparedwiththeexperimentalresult，showingthatth

7、erearesomeconformitiesbetweenthemThefactorsinducingthedifferenceisanalysedfurther2Usingthefour—dimensioncodeoflaserpropagatinginatmosphere，thefactorsaffectingtheamountofbranchpointsisanalysedTheresultshowthatemissiondiam