多點(diǎn)泵浦鉺鐿共摻光纖激光器的理論研究.pdf

1、西南交通大學(xué)碩士學(xué)位論文多點(diǎn)泵浦鉺鐿共摻光纖激光器的理論研究姓名：沈哲申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：潘煒201006西南交通大學(xué)碩士學(xué)位論文第1I頁IAbstractDouble—cladfiberlaserhasbeengettingmoreandmoreattentiontheseyearsbecauseofitsspecialstructureandtheoutstandingfunctionoftheraree

2、arthionsdopedEspeciallymultipointpumpdouble—cladfiberhasbeenresearchedforitsadvantages，suchasextendingthepumppowereffectivelyimprovingtheheatdissipationofthefiberandoptimizingtheoutputcharacteristicsWemainlyresearchedthe

3、outputcharacteristicsoftheEr3／yb軸codopedfiberlaserunderthemultipointpumpFirstlysomebasicprinciplesoffiberlasersareintroducedbrieflyincludingthekeytechniqueofdoublecladfiberlasers，thecharacteristics，thedevelopmentaswellas

4、theapplicationsSecondlyweanalyzedtheenergysystemofthelaserandtherateequationinsteadystateThirdlyweintroducedtheeffectofdosageconcentrationschangingofEr3／Yb3tothelaserthatistoputYb“intoEr3bysuppressingthephenomenonofreduc

5、ingthetransformationefficiencycausedbyconcentrationquenchingWefoundthatitisfeasibletodecreasingthetransferefficiencybyputting場抖intoEr抖toavoidthedroptotransformationefficiencyduetoconcentrationquenchingFinallybasedonthera

6、teequationnumericalanalysisofthe980nmEr3／場codopeddoublecladfiberlaserhasbeenpreformedinMatlabsoftwareAccordingtotheoutputcharacteristicsofthemultipointpumpEr3／yb3COdopedfiberlaserwecalculatedtheinfluenceofpumpnumberonthe

7、transformationefficiencywitllthesamefiberlengthThenoptimaldesignisimplementedAccordingtothesimulationresults，severalconclusionsaredrawnasfollow：1Comparedwitllthesinglepointpumplaserthedistributionofpumppowerinmultipointp

8、umplaserismoreevenalongthefiber2Theoutputpowervaries、衍t11thenumberofthemultipointpumpBeforethefiberlaserissaturated，thelargerthepointsnumberis，moreoutputpowerwecouldgain3Theoutputpowerisaffectedbythereflectivityofmirrors

9、onbothendsThelargerthefrontmirrorreflectivityorthesmallerthebackmirrorreflectivitythemoreoutputpowercouldbegained4Tothelaser麗nlacertainfiberlength，thenumberofpumppowermustbeconsideredtoobtainoutputefficiencyandtOavoidmor

10、elossofpumppowerWefoundthattheefficiencyofthelaserwouldbehighifthelengthofthefiberislOOmandthepumppowerobeyshomogeneousdistributionandthepumppointisnomorethan5Whenthelengthandthepowerarestateddifferentdistributionsofpump