氮?dú)庵蟹枪簿€聚焦雙光束三次諧波增強(qiáng)的實(shí)驗(yàn)研究.pdf

1、華東師范大學(xué)碩士學(xué)位論文氮?dú)庵蟹枪簿€聚焦雙光束三次諧波增強(qiáng)的實(shí)驗(yàn)研究姓名：楊鐵軍申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：光學(xué)指導(dǎo)教師：丁良恩20080501摘要AbstractThepropagationofintensel硒cfpulseinmmsparentmattercausess仃DngnonlineareffeCts，such弱fourwavemixing，selffocusing，selophaSemodulation(SPM)，third

2、—orderha肌onicgeIleration(THG)etc。Anintensefemt0secondl硒crpulsec柚propagatemanyRaylei曲lengthsingasPropagationo仆i曲一powerpulseoV盯suchlongdistaIlceisl(no、Ⅵltobetheresultofmedyll鋤icbalancebeMeeIltheKe盯self二focusingduetotllenom

3、ineare毹ctsingaSeousmedia’dif行action，andmedefocusingeffectofplasmafonIlationduetomultiphotoniomzationThedyIl鋤icequilibriumb娟Ⅳeentheself二focusinganddefocusingintllech猢elcansupporta10ngplaSma℃hannelintheinteractionoftheinte

4、nselaSerpulseaIldgaseousmediaTllisisbeneficialt0gethi曲h鋤011icconVersione銜ciencyinmeintera“on，beausetlleconverSione伍ciencybe觚ecntlle缸nd鋤entalwaVea11dh鋤onicwaVedoesnotoIllydependon1aSerintensit)r，butalsooninteractionlen垂hE

5、xtendingofinteractionleIlgthownedtotheplasmachannelisapromisingwaytoachieVedhighconVerSione佑cieIlcyTHGisbelieVedapromisingmethod矗竹acllicVinghi曲bri曲tness，coh即eIltultraVioletandx—rayliglltsourcesTherefore，muchattelltionhas

6、beeIlpaidtoTHGbytlleselfguidedf醣ltosecondpulsesingaseousmediaRecently，THGhasbeeIlobservedaJldstudiedext朗siVely，butmeseresearch銘wercmailllyonTHGofplasmachannelproducedbysin百efocusedfemtosecondpulseandTHGdriVedbydualcollin

7、earpulsesingaseousmediaIIlmisletter，wefocusourattentiononTHGofaplasmachanllelgeneratedbyMononcollineaurfocusedhi曲powerfemtosecondlaserpulsesinN2cellT11elaserw嬲operatedat10HZ鋤ddeliVeredpulsesofal0mJmaXimumene略y，60蠡FWHM(如1

8、1widthathalfma)【imum)minim啪duration，withspectrumcentredat820衄111meexp耐mentainterestingphenomen如sha叩e11llanc鋤e11tofTHeⅡlissionisobservedTheconditionswrhichaffectme肌haIlc鋤entofTH，suchaSgaspressure，relatiVedeIayof吶opulses，c