脉冲泵浦下掺铒光纤放大器自发辐射的分析

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1、万方数据j匕塞交通厶堂亟±堂僮论窒△旦苎!B△￡至ABSTRACTErbium-dopedfiberamplifierhasestablisheditsStatUSinthefieldofopticalcommunicationbecauseofitsuniqueadvantages；anditisalsoveryimportanttothedevelopmentofall-opticalcommunication．Theactivespontaneousemissionnoiseplaysanimportantroleinerbium-dopedfiberamplif

2、ier；what’SⅡlorc，asthesourcetostart—uptheerbium-dopedfiberlaser,italsoseriouslyinfluencestheperformanceoferbium-dopedfiberlaser．Sotheresearchofactivespontaneousemissionoferbium-dopedfiberhasneverstopped．HoweveLalltheresearchesbeforewerecarriedoutundercontinuouslightpump．Comparedtocontinuo

3、uslightpump，thepulselightpumphasmanyadvantagessuchaslowenergyconsumption，lownoiseandwaveform-shaped．Sostudyingactivespontaneousemissionunderpulse-pumPhasimportantacademicsignificance．Beguntheresearchwithrateequation，thispaperhasbrokenthelimitationofpumpwaveformtostudytheactivespontaneous

4、emissionoferbium-dopedfiberpumpedbyarbitrarywaveformpulse．Bydividingthetimeintotinyperiods，weobtainedtheexpressionforpopulmiondistributionofeachlevelandaveragepoweroftheactivespontaneousemission．Andthenwehavesimulatedsituationspumpedbytheidealrectangularpulseandtwoothernon-idealwaveformp

5、ulserespectively．Theexperimentsshow血attheresultsconsistentwiththetheoreticalanalysis．Theseresearchescarlbeusedtoall—opticalmodulationfortheopticalfiberlaser．KEYWORDS：Erbium-DopedFiberAmplifier(EDFA)；Erbium-DopedFiber(EDF)；pulsepumping；ActiveSpontaneousEmission(ASE)；All-opticalModulation万

6、方数据jE立銮逗盔堂亟±．堂焦j金窒庄序本文继承了以往人们对连续光泵浦下掺铒光纤放大器自发辐射特性的工作，深入研究了EDFA在脉冲光泵浦下的自发辐射特性。首先研究了近似理想矩形脉冲下的情况，进一步的工作拓展到任意波形脉冲的情况。由分析EDF自发辐射的速率方程组开始，采用分时段计算的方法得到了自发辐射的平均功率表达式，从而对于任意波形脉冲泵浦下掺铒光纤的自发辐射特性进行了大量的理论分析。经实验表明，理论分析与实验结果相符合。万方数据目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．iiiABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．iv序⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯v1绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1课题提出的研究背景和意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．2EDFA自发辐射特性的研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．1连续光泵浦下的EDFA自发辐射⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．2脉冲光泵浦下的EDFA自发辐射⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．3论文的主要内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．