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1.
1 Introduction  Sincefirstholographicrecordingexperiments[1,2 ] ,theholographicstoragetechnologyhasmadegreatprogressandisclosetocommercialrealitywiththeacquirementofhugebulkholographicmaterialsofhighopticalqualityandthematurationofassociateddevicetechnol…  相似文献   

2.
1 Introduction  ItwasshownthatLiNbO3dopedwith5mol%ormoreMgOischaracterizedbyhighdamagethreshold[1]comparedwithundopedLiNbO3.MgO∶LiNbO3waveguidecanbefabricatedbyprotonexchange[2],whichissimilartothematureannealedprotonexchange(APE)technologyofLiNbO3.Therehasbe…  相似文献   

3.
1 Introduction  InrecentyearsLiNbO3crystalshavereceivedmuchattentionbecauseoftheirexcellentnonlinearproperties,andcanbeusedformanyapplicationsinthefieldsofelectro optics,laser physics,holographyandacoustics.Periodically poledcongruentLiNbO3 crystal (PPLN )h…  相似文献   

4.
1 Introduction  Inphotorefractivecrystal,manyapplications,suchasimageamplificationandimagestorage ,needtousethepropertyofhighdiffractionefficiency .Someauthors[1] havereferredthathighdiffractionefficiencyinphotorefractiveLiNbO3crystalcanbeobtainedbywriting…  相似文献   

5.
DesignofMetal-cladTi:LiNbO_3PolarizerHUH.Z.,CHENGG.(DepartmentofappliedPysics,TianjinUniversity,Tianjin300072,China)GENF;SONG...  相似文献   

6.
Measurementsofrefractiveindexprofilesofproton-exchangedLiNbO_3waveguidesusingTE-TMmodeconversionWANGBao(InstituteofOpticalCAD?..  相似文献   

7.
1 Introduction  Laserdiode(LD)pumpedpassivelyQswitchedminiaturelaserscangeneratehighpowerandhighrepetitionratepulsesinthenanosecondandsubnanosecondregimes,andhavewideapplicationsinmicromachining,ranging,remotesensing,microsurgeryandsoon.Owingtolaserdiode…  相似文献   

8.
用紫外可见光谱 (UV/VisibleSpectra)测试并研究了坩埚下降法生长的LiNbO3 、Fe∶LiNbO3 ,以及Zn∶Fe∶LiN bO3 晶体的吸收特性。分析了产生这些吸收特性的原因以及与工艺生长方法的内在联系。研究结果表明 :LiNbO3 单晶沿晶体生长方向 ,其紫外吸收边向长波方向移动 ,且在 35 0~ 4 5 0nm波段的吸收也逐渐增大 ,这是由于Li的分凝与挥发 ,逐渐产生缺锂所造成的 ;在Fe∶LiNbO3 单晶中观察到Fe2 + 离子在 4 80nm附近的特征吸收峰 ,并发现沿生长方向 ,Fe2 + 离子的浓度逐渐增加 ,这与提拉法生长得到的晶体不同 ;在Fe∶LiNbO3 单晶中掺入质量分数为 1.7%ZnO后 ,吸收边位置发生蓝移 ,而掺杂质量分数达到 3.4 %时 ,观察到有红移现象。Fe2 + 离子在Zn∶Fe∶LiNbO3 单晶中的浓度与ZnO掺杂量有密切关系。在掺杂质量分数 1.7%ZnO的Fe∶LiNbO3 单晶中 ,Fe2 + 离子从底部到顶部的浓度变化比在掺杂质量分数 3.4 %ZnO晶体中大 ,这是由于Zn2 + 抑制Fe2 + 离子进入Li位的能力随掺杂量的增加而逐渐减弱造成的。就该下降法工艺技术对Fe2 + 离子在晶体中的浓度分布的影响作了分析  相似文献   

9.
1 Introduction  Duetothefeatureoflargethird ordernonlinearsusceptibility ,lowpowerthresholdandfastresponsetime ,thelowdimensionsemiconductormaterialshavepotentialapplicationsinthefieldofnonlinearopticaldevices,suchasopticalinformationstorageandopticalsw…  相似文献   

10.
1 Introduction  Cr,Tm ,Ho∶YAGisakindofveryimportant 2 μmlasercrystal,whose 2 .1 μmlaserisabsorbedstronglybywatercomponentoftissue,resultinginshallowtissuepenetrationandgoodsurgicalprecisioninmosttypesofsoftandhardtissue .Ho∶YAGlaserhasbecomeanimportantsource…  相似文献   

11.
1 Introduction  Ti∶sapphirelaseristhemostwidelytunablelaserinthecurrentlasertechnologyandhasatuningrangefrom 0 .68to 1 .1 μm .Soitis quiteimportantandusefulwithnonlinearopticalfrequencyconversiontechnologytoexpanditsoutputwavelength .Nonlinearwavelengthconver…  相似文献   

12.
1 Introduction  Recently ,laser performanceofnewYb3 ∶KY (WO4) 2 crystal (Yb3 ∶KYW )hasbeenobtainedat 1 0 2 5nm[1] .TheYb3 ∶KYWcrystalisa promisingmaterialformicrochipand passivemode lockedlaserstunableintherangeof 1 0 2 0~ 1 0 6 0nm .ItisknownthatKerr lensmode lockingtechniq…  相似文献   

13.
理论分析和实验观测了非相干背景光辐照下掺杂LiNbO3晶体中的二波耦合 ,发现非相干背景光能够在很大范围内灵活有效地控制信号光增益 ,抑制扇形效应 ,提高信噪比 ,缩短光栅的建立时间 .入射光光强比一定时 ,适当地增大背景光光强可以使光栅响应时间减小一个数量级 .尤其对于抽运光光强远大于信号光光强的情况下 ,上述作用更为明显 .  相似文献   

14.
1 Introduction  Thebehaviorofmoleculesinstrongopticalfieldiscomplexbecauseoftheentanglementofdissociationwithionization.TheessenceofstrongfieldionizationinmoleculesinthevisibleandnearIRrangeswasrevealedthroughthesemi classicalfieldionizationmodelfirst…  相似文献   

15.
1IntroductionItisrecentlyshownthatmoreandmoreinteresthasbeenconcentratedontheresearchofminiaturesolidstatelaserdeviceswhich...  相似文献   

16.
Single-ModeCW532nmOutputof1.3WbyInternalFrequencyDoublingwithTi:MgO:LiNbO_3¥LIJian;WULing-An(InstituteofPhysics,AcademiaSinic?..  相似文献   

17.
AlargesizeandhighopticalqualityNd∶GdCOBcrystalwasobtainedbyCZpullingmethod.Thecrystalswerecutintwosamplewiththesamedimensionof3× 3× 8mm3 .TheoscillatinglasertravelsthroughonesamplealongX axisandtheotheralongY axis〔theanglesbetweenthecrystallophysicaxisand…  相似文献   

18.
AlargesizeandhighopticalqualityNd∶GdCOBcrystalwasobtainedbyCZpullingmethod.Thecrystalswerecutintwosamplewiththesamedimensionof3×3×8mm3.TheoscillatinglasertravelsthroughonesamplealongXaxisandtheotheralongYaxis〔theanglesbetweenthecrystallophysicaxisandthe…  相似文献   

19.
1 Introduction  Inthepastthirtyyears ,muchattentionhasbeenpaidtotheconversionofnearinfraredradiationtovisiblelightinrareearthdopedmaterialsduetoits potentialapplicationsinoptical disktechnology ,informationtechnology ,colordisplaysandsoon .Manykindsofrare…  相似文献   

20.
以提拉法生长Zn(1mol% )∶Fe∶LiNbO3,Zn(4mol % )∶Fe∶LiNbO3,Zn(7mol% )∶Fe∶LiNbO3晶体 Zn∶Fe∶LiNbO3晶体随着Zn2 + 浓度的增加 ,抗光致散射能力增加 ,Zn(7mol% )∶Fe∶LiNbO3晶体抗光致散射能力比Fe∶LiNbO3晶体提高两个数量级以上 测试了Zn∶Fe∶LiNbO3晶体衍射效率、响应时间 以Zn(7mol % )∶Fe∶LiNbO3晶体作为存储元件 ,Zn(4mol% )∶Fe∶LiNbO3晶体作为位相共轭镜 ,进行全息关联存储试验 试验结果显示出成像质量好、图像清晰完整、噪音小等优点 研究了Zn∶Fe∶LiNbO3晶体全息存储性能增强的机理 Zn(4mol% )∶Fe∶LiNbO3晶体具有全息存储性能最佳的综合指标  相似文献   

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