基于硅基集成波导的激光脉冲压缩分析

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1、浙江大学硕士学位论文JV摘要AbstractSiliconhasbeenconsideredasabasicmaterialforoptoelectronicintegrationduet0itshighrefractiveindexandexcellentopticalcharacteristics．Inparticular,siliconwirewaveguidesbasedonsilicon-on-insulator(sodstructurehaveexhibitedadjustabledispersionandhighnonli

2、nearityetc．，whichmakesitpossibletogenerateandcompresslaserpulsebasedonsiliconwirewaveguides．Thisthesisfocusesonlaserpulsegenerationmethodthroughpulsecompressionandmode—lockinginlasercavitybasedontwo—photonabsorption(TPA)andfree-carrierabsorption(FCA)inanintraeavitysilico

3、nwirewaveguide．Also，integratedlaserpulsecompressionmethodsbasedonsiliconwaveguidesareproposed．Byoptimizingthestructureanddimensionoftheusedsiliconwaveguide，adjustingtheelectricalparametersappliedtothesiliconwaveguideortheamplifier,andoptimiz吨thedispersionandnonlinearityo

4、fsiliconwaveguide，theeffectivelaserpulsecompressioninsideandoutsidecavityarebotheffectivelyrealized．Weintroducetheresearchprogressonthepulsecompressionandsilicon-basedlasers．Thetheoreticalmodelofpulsecompressionandmode—lockinginsiliconwaveguidesisestablished．111efactorst

5、hatinfluencetheoutputpulsearetheoreticallyandexperimentallyinvestigated,includingpumpingcurrent,modulationdepth，anddutycycleofthemodulationsignal．neexperimentalresultsag啪wellwiththetheoreticalanalysis．Itisshownthatsmallerdutycycleofthemodulationsignal，largermodulationdep

6、th,orlargerpumppowerisbeneficialforpulsecompression．Wealsoexploretheintegratedpulsecompressionmethodoutsidethelasercavity．Akindoftypicalpulsecompressionmethodisbased011thechirpcompensationbythedielectricdispersioninthecompressionmedia．Therefore，largerdispersionisbenefici

7、altoreducecompressor’Svolume．AnintegratedpulsecompressionmethodisproposedbasedonaSOlwaveguideandthewaveguidelengthisoptimizedtobeaslongas50cmtoachieveacompressionfactorofO．078．InordertOshortenthelengthofthecompressionwaveguide，amediawithhigherdispersionvalueshouldbeused．

8、Byusingasiliconline—defectphotoniccrystalwaveguide，theintegratedpulseV浙江大学硕士学位论文一_一_-_-—_—_——●—l—_——-——