12498.渦旋光束在湍流大氣中的傳輸特性研究

1、聲明本學(xué)位論文是我在導(dǎo)師的指導(dǎo)下取得的研究成果，盡我所知，在本學(xué)位論文中，除了加以標(biāo)注和致謝的部分外，不包含其他人已經(jīng)發(fā)表或公布過的研究成果，也不包含我為獲得任何教育機(jī)構(gòu)的學(xué)位或?qū)W歷而使用過的材料。與我一同工作的同事對(duì)本學(xué)位論文做出的貢獻(xiàn)均已在論文中作了明確的說(shuō)明。研究生簽名：z√z年歲月加日學(xué)位論文使用授權(quán)聲明南京理工大學(xué)有權(quán)保存本學(xué)位論文的電子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部?jī)?nèi)容，可以向有關(guān)部門或機(jī)構(gòu)送交并授權(quán)其

2、保存、借閱或上網(wǎng)公布本學(xué)位論文的部分或全部?jī)?nèi)容。對(duì)于保密論文，按保密的有關(guān)規(guī)定和程序處理。研究生簽名：20／f，年歲月zD日型型竺蔓—————————————————一堡圭笙塞———————————————————一耿工佑義AbstractKecentlythevortexbeamhasspecialspimlphasestructurewhichmakeorbitalangularmomentumItpresentssmallspot

3、sonthephasesingularityThesecharacteristicsmakeitwidelyusedinopticalmicromanipulation，informationtransmission，biologicalmedicinequan嘶codmgandotherfieldsEspeciallyinthefieldofspaceopticalcommunication州chhasmorepotentialapp

4、licationvalueInvestigationonthe衄lsmissioncharacteristicsofVortexbeampropagatingintheatmosphericturbulenceisoneofthemostintereStingresearchfieldaboutthefreespacecommunicationAtmosphericturbulencehaSseriousinfluenceonvonex

5、beampropagatinginatmosphereturbulence，whichCancausescintillation，be鋤幽RaIldbe鋤spreadingScintillationisthebasicproblemabouttheturbulenceefiect’whichis1mportanttothelaserradardetectioninatmosphere，atmosphericp啪etersmeaSurem

6、entadaptiveopticsHartmannwavefrontdetectionsensorandlasercommumcationBaSedonthenumericalsimulationmethod，theestablishmentofsinlulatjonmake廿1eatmo研)nencchannelasrandomphasescreenWeuseellipticvortexbeam，IaguerregaussianVon

7、exbe鋤aIldpolncarevortexastheresearchobjectthestrengthofthe鋤osphericturbulenceandthebeamparametersisstudiedontheperformanceofthevortexbe鋤propagatlonmtheatmosphericturbulenceThroughthespecificnumericalsimulationexpenmentre

8、sultsshowthatthestrengthoftheatmosphericturbulencewillflickerindexinthe仃ansmissionprocessofvortexbeamscausedobviouschanges，whentIⅡbulentstmctI鵬oRenordersofmagnitudegreaterthanthe10to17，lightintensityfluctuationisinfluenc

9、edbYturbulencegeneratedsignificantchanges；Topologicalchargeandbe2LrnwaistwidthofVonexbe鋤sinatmosphericturbulencewillimpactscintillationindex；WhenitstopoiogYisbIgger，thetransmissionintheturbulentatmosphereflareshapekeepin

10、gdegreeishigheralsoitsperformanceismorestable；Thebeamwaistwidthwhichisthegreaterthebe鋤underthe1niluenceofturbulencedegreeissmallerIntheprocessoftransmission，phasealsoshoweda骶ndofSCreWrotation，thedirectionofrotationisclos

11、elyrelatedtothetopologicalchargeofplusorminusThestudyalsofoundthatthepoincarevortexisembeddedwitllvectorbeal：nslntheprocessoftransmission，therotationofthelightintensitypresentssigniflcantf宅aturesDirectionofrotation，which

12、isdecidedbythetopologicalchargeofplusorminust11e‘opologicalchargeisnegative，itisintoaclockwiseWecanadjusttheparametersatdi恐rentconditlons，thevortexbeamwillgiveamoreidealtransmissioneffectCompared、忻tllthetraditionallasers