紧凑型光子晶体光纤锁模激光器及纠缠光子源的研究

《紧凑型光子晶体光纤锁模激光器及纠缠光子源的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、天津大学博士学位论文紧凑型光子晶体光纤锁模激光器及纠缠光子源的研究姓名：张玉颖申请学位级别：博士专业：光学工程指导教师：王清月;胡明列20090801关键词：光子晶体光纤光纤激光器锁模飞秒激光四波混频量子通信纠缠光子ABSTRACTPhotoniccrystalfibers(PCF)bringnewopportunitiestomanyscientificresearchfieldsbasedontheiruniquestructuresandadvantages．DuetOtheadvantagesoft

2、helowcost,compactstructure，enhancedstabilityandhighoutputpower，passivemode—lockingbasedonPCFadvancedthepopularizationprocessofthefemtosecondlasertechnology．Theapplicationinquantuminformationofphotoniccrystalfiberhasbecomeoneofthemostthrivingresearchareas．U

3、tilizingitsadvantages，andtogetherwiththestableultrafastlaser,PCFbroughteffectivemethodsinproducingcompactandhighefficiencycorrelatedphotonpairs．Thisdissertationmainlyfocusesonwaystorealizehighpower,compactmode—lockingPCFlaser’andtheproductionofcorrelatedph

4、otonpairsbyusingPCEMainpointsincluding：1．Anewkindofhighpowermode—lockingPCFlaserwithfiberfacetoutputcouplerisestablishedbyusingyb3+dopedlarge-mode—areaphotoniccrystalfiber(LMAPCF)．Semiconductorsaturableabsorber(SESAM)isusedtoachieveself-startpassivemode—lo

5、cking．Onefacetofthefiberisdirectusedasthecavitymirror,reducingthecomplexityofthebulkcomponents，makingthehighpowerPCFlasermorecompactandpracticaltouse．ThenumericalsimulationofthePCFlaserisestablished．Theoutputpropert,iesofthelasersystemandthemode-lockingmec

6、hanisminthecavityareanalyzedthroughnumericalsimulation．Theresultsofthesimulationwellfittheexperimentalresults．2．Yb”dopedLMAPCFmode-lockedlaserwithfiberfacetoutputcouplerandgratingsforthedispersioncompensationisestablished．Outputpulseswith3．1Waveragepoweran

7、d56rdpulsesenergyaredirectlyobtained．Thepulseswidthofdirectoutputis494fs．Also，theoutputpulsewidth，spectralwidth，andcentralwavelengthallcanbetunedtosomeextend．Thefilter-inducedbreathinginspectrumandpulsewidthisstudied．3．Yb”dopedLMAPCFmode-lockedlaserworksin

8、all—normaldispersionregimeisestablished．Outputpulseswith2．6Waveragepowerand46nJpulsesenergyaredirectlyobtained．Thedirectoutputpulsewidthis1．9fs，andCallbeexternalcavitycompressedto425fs．Furthermore，byintroduci