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1、四川師范大學(xué)碩士學(xué)位論文部分相干列陣激光束通過湍流大氣的傳輸特性研究姓名：李曉慶申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：光學(xué)指導(dǎo)教師：季小玲20100531中文摘要陣光束與單束高斯光束在自由空間和湍流大氣中均可具有相同的方向性。但是，由角擴(kuò)展和歸一化遠(yuǎn)場(chǎng)平均光強(qiáng)分布所表征的部分相干H．G列陣光束的方向性是不一致的，而湍流可以使得兩種描述一致。(4)采用湍流距離幻為參數(shù)，定量地研究了大氣湍流對(duì)徑向分布的GSM列陣光束擴(kuò)展的影響。推導(dǎo)出了徑向分布的GSM‘列陣光束的湍流距離研的一般解析表達(dá)式。研究表明選擇合適的列陣光束
2、參數(shù)和光束合成方式可以減小湍流對(duì)徑向分布的GSM列陣光束的影響。關(guān)鍵詞：光束合成；高斯．謝爾模型(GSM)歹tJ陣光束；部分相干厄米一高斯(H-G)列陣光束；光束質(zhì)量；傳輸特性：角擴(kuò)展與方向性；湍流距離；IIAbstractStudyonthepartiallycoherentarraybeamspropagatingthroughatmosphericturbulenceMajor：OpticsPostgraduate：LiXiao．．qingSupervisor：JiXiao．．1ingAbst
3、ract：Laserarraybeamshavebeenattractedmuchattentionbecauseoftheirwideapplicationsinhigh—powersystem，inertialconfinementfusionandlligh-energyweapons，andSOon．Ontheotherhand，thepropagationoflaserbeamsinatmosphericturbulenceisatopicthathasbeenofconsiderable
4、theoreticalandpracticalinterest．Inpractice，apartiallycoherentandhighordermodelaserbeamsisoftenencountered．Inpractice，partiallycoherentandhighordermodelaserbeamsareoftenencountered．Therefore，itisveryimportanttostudythepropagationpropertiesofpartiallycoh
5、erentandhighordermodelaserbeamsthroughatmosphericturbulence．Themainworksinthisthesisaresummarizedasfollows：(1)111eRayleighrangeandthe膨一factoraretakenasthecharacteristicparametersofbeamquality,andthebeamqualityofradialGaussianSchell—model(GSM)arraybeams
6、isstudiedindetail．111eanalyticalexpressionsfortheRayleighrangeandthe砰一factorofradialGSMarraybeamsarederived．Itisshownthatforthesuperpositionofthecross-spectraldensityfunctiontheradialGSMarraybeamhasznthatislongerandhasthe膨一factorthatislowerthanthatfort
7、hesuperpositionoftheintensity．AscomparedtoasingleGSMbeamcenteredattheorigin，theradialGSMarmybeamhasthelongernoil一spreadingdistance，buthasthehigher砰．factor．(2)TheinfluenceofatmosphericturbulenceonthepropagationofsuperimposedpartiallycoherentHermite-Gaus
8、sian(H．G)beamsisstudiedindetail．TheIIIclosed·formpropagationequationofsuperimposedpartiallycoherentH．Gbeamsthroughatmosphericturbulenceisderived．Itisshownthatthen曲ulenceresultsiIlabeamspreadingandadecreaseofthemaximumintensity．However,t
