调Q和锁模光纤激光器的研究

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1、南开大学硕士学位论文调Q和锁模光纤激光器的研究姓名：马宁申请学位级别：硕士专业：光学指导教师：袁树忠2001.5.1南开大学硕士生学位论文AbstractInrecentyears，fiberlasershavedevelopedrapidlyduetOthedemandofopticalfibercommunication，especially,theultra·shortpulsefiberlaserwhichhasdrawnmoreandmoreattentionbecauseofitspoten

2、tialapplicationsinOTDM(OpticalTimeDivisionMultiplexing)techniqueandopticalsolitonconmaunicationsystem．Theauthorfirstsummarizesthebasicprincipleofthefiber1aserandseveralmethodstOgenerateultra-shortpulsesinthefiberlaser,thendiscussestheQ-switchedfiberlaser

3、andmode—lockedfiberlasertheoreticallyandexperimentallyindetail，meanwhileintroducestheresearchonultra—shortpulsessemiconductorlaserwithafibergratingexternalcavity．Thethesisfocusesonultra-shortpulsesfiberlaserandincludesdescriptionsonthefollowingsubjects：(

4、1)．ThetheoreticalanalysisofaQ—switchedfiberlaserandexperimentalstudyontheself-Q-switchedphenomenonofanerbium—dopedfiberlaserareconducted．Theself-Q—switchedpulsesofhigherbium-dopedFabry-Perotcavityfiberlaserareobservedandtheoreticallyanalyzed．(2)．Utilizin

5、gthenon-linearitycharacteristicsofsinglemodefiber-backstimulatedBrillouinscattering(BSBS)andthewavelength·selectingcharacteristicsoffibergratings，self-Q—switchedpulsesareachievedfromalinearcavityerbium·dopedfiberlaserpumpingbya980nmLDcontinuewave(CW)pump

6、ing，Thepulsewidthis2．2nsandtherepetitionfrequencyofpulsesis64．5MHz．(3)．Thetheoreticalanalysisandtheexperimentalstudyonanactivemode-lockedfiberlaserareconducted．Theharmonicmode·lockedpulsesof2．5GHzand5GHzareachievedandthe2-4orderrationalharmonicmode-locke

7、dpulsesof2．5GHzareresearchedinactivemode—lockederbium·dopedfiberringlasers．r41．Thewavelength—tuningmethodsofactivemode—lockederbium—dopedfiberringlasersareresearched．Usingfibergratingtosubstitutetraditionalwavelength—selectingcomponents，the8nmtuningrange

8、isrealizedatarepetitionfrequencyof2．5GHz．f5)．Thewavelength—tuningmethodsofanactivemode—lockedfiberlaserusingaLDasamodulatorareresearched，andtwotuningmethodsincludingtemperaturetuning塑茎奎兰堡圭篁耋堡兰圣andpolarizationtuningareputfo