基于Yb-YVO4晶體的波導傳播特性及其激光調(diào)Q性質(zhì)研究.pdf

1、分類號：O437密級：UDC：分類號：O437密級：UDC：535.8學校代碼：11065學校代碼：11065碩士學位論文基于基于Yb:YVO4晶體的波導傳播特性及其激光調(diào)晶體的波導傳播特性及其激光調(diào)Q性質(zhì)研究性質(zhì)研究李曉紅指導教師孔偉金教授學科專業(yè)名稱光學論文答辯日期2015年6月9日AbstractThewaveguideisthestructurethatlimitthelightpropagationin3Dspacethema

2、terials’refractiveindexisdifferent.Currentlytheintegratedphotonicsisrapidlydeveloping.Indertoenhancethephotonicsinfmationtransmissionprocessingcapabilitytheintegratedminiaturizedwaveguideisdesigned.Inthepaperthebasicstru

3、cturepreparationmethodofwaveguidewasdesigned.UsedtheclassicalopticaltheyelectromagismasthetheeticalbasisfromthepointofgeometricalopticsMaxwellequationsboundaryconditionsthetransmissionpathofalightwaveinthewaveguidewasobt

4、ainedthewaveequationwasdeduced.Withthewidelyapplicationofcomplexstructurewaveguidethedinarytheeticalanalysiswasverydifficulttogettheaccurateanalyticsolution.Thepaperdescribedbasicsolutionofbeampropagationmethodusedthefin

5、itebeampropagationmethodtosolvethewaveequationthenthemathematicalexpressionsoffinitebeampropagationmethodwasderived.IndertodesignlowlosshighefficiencywaveguidetheYb:YVO4crystalwasusedasthemediummaterialusingRsoftsoftware

6、simulatethetransversemodesofchannelwaveguidebychangingtheparametersofwaveguidestructure.IntheSinglewaveguidetransversedimensionofthespotwascontrolledbywaveguide’swidththelongitudinaldimensionofthespotwascontrolledbywaveg

7、uide’sdepth.Whenthewidthwasequaltothedepththespotwasaroundspotifincreasedtheirvaluethespotsizealsoincreased.Theresultofdoublelinewaveguidewasdifferentwiththesinglewaveguidethelightfielddistributionwasconnectedwiththedoub

8、lelinedistance.withtheincreasingofdepthwidthvaluespotsizebecamesmallerthenstableifcontinuetoincreasethevaluethespotsizegrowlarger.FinallythepassiveQswitchinglaserperfmanceofYb:YVO4crystalwasdiscussed.Producinganaverageou

9、tputpowerwas0.87Watapulserepetitionrateof71.4kHztheslopeefficiencywas31.25%.MakinguseofaCr4:YAGcrystalplateasthesaturableabsberitsinitialtransmissionwasashighas99.3%.Theresultingpeakpowerpulseenergydurationwere0.14kW12.2