共查询到20条相似文献,搜索用时 18 毫秒
1.
《Chinese Journal of Lasers》2000,(4)
AlargesizeandhighopticalqualityNd∶GdCOBcrystalwasobtainedbyCZpullingmethod.Thecrystalswerecutintwosamplewiththesamedimensionof3× 3× 8mm3 .TheoscillatinglasertravelsthroughonesamplealongX axisandtheotheralongY axis〔theanglesbetweenthecrystallophysicaxisand… 相似文献
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《Chinese Journal of Lasers》2000,(3)
AlargesizeandhighopticalqualityNd∶GdCOBcrystalwasobtainedbyCZpullingmethod.Thecrystalswerecutintwosamplewiththesamedimensionof3×3×8mm3.TheoscillatinglasertravelsthroughonesamplealongXaxisandtheotheralongYaxis〔theanglesbetweenthecrystallophysicaxisandthe… 相似文献
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Falihati. Mejiti V.L.Kalashnikov I.G.Poloyko Toran. Vajidi Physics Department Xinjiang University Urumqi China International Laser Center Belorussian State Poletechnical Academy Skoryna Ave. Bldg.. M 《Chinese Journal of Lasers》2002,(3)
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
4.
SONG Yanrong LI Zhonghao XIAO Yan WANG Haibing ZHOU Guosheng 《Chinese Journal of Lasers》2000,9(1):15-19
1 Introduction Withincessantappearanceofnewlasercrystalswitheverwiderfluorescencespectrum,suchasTi∶sapphire,Cr4 ∶YAG,theprelimi... 相似文献
5.
《物理》2000,29(6)
1 Noncquilibrium patternsingranularmixingandsegregation(TroyShinbrot ,FernandoJ.Muzzio .Phys .Today ,2 0 0 0 ,No .3)2 Atmosphericinfrasound (AlfredJ .BedardJr ,ThomasM .Georges.Phys.Today ,2 0 0 0 ,No .3)3 Liquidcrystalsandcarbonmaterials(RobertH .Hurt,Zhong YingChen .Phys.Today ,… 相似文献
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1 INTRODUCTIONBecausesomeimportant propertiesofcrystal(suchasspecificheatathightemperature ,melting ,thermalexpansion ,temperaturede 相似文献
8.
《Chinese Journal of Lasers》2002,(6)
·LASERDEVICES·ExperimentalStudyonActive passiveMode lockingUsingCr4 + ∶YAGasSaturableAbsorber1 61 1AMicrochipTunableBlueLaserSourceBasedUponCr∶LiSAFinContactwithKNCrystal1 61 5HighPower 940nmAl freeActiveRegionLaserDiodesandBarswithaBroadWaveguide1 61 91 .3 2 μmNd3+ ∶Y… 相似文献
9.
Chen Yunlin Xu Jingjun Song Feng Zhang Guangyin Li Shichen Photonics Center College of Physics Science Nankai University Tianjin China College of Precision Instrument Optoelectronics Engineering Tianjin University Tianjin 《Chinese Journal of Lasers》2001,10(2):114-116
1 Introduction InrecentyearsLiNbO3crystalshavereceivedmuchattentionbecauseoftheirexcellentnonlinearproperties,andcanbeusedformanyapplicationsinthefieldsofelectro optics,laser physics,holographyandacoustics.Periodically poledcongruentLiNbO3 crystal (PPLN )h… 相似文献
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The Study on the Interaction between Tm~(3 ) and Tb~(3 ) Rare Earth Ions in YVO_4 Crystal 总被引:1,自引:0,他引:1
HUANG Lilei HONG Zhi ZHUANG Jian 《Chinese Journal of Lasers》2001,10(6):450-454
1 Introduction Thelasingperformancesofrare earthionTm3 dopedlasercrystalsat~ 2 .3 μmand~1 .9μmwavelength ,correspondingto3H4→3H5 and3F4→ 3H6 transitionswerestudiedbyJ .A .Caird[1] andL .F .Johnson[2 ] .RecentlyF .S .Ermeneux[3] suggestedthelasingpossibilitiesofTm3 dopedlaserc… 相似文献
11.
YANG Shengli CHEN Mouzhi 《Chinese Journal of Lasers》2002,11(1):23-26
1 Introduction Severalbiaxialcrystals ,suchasKTP ,LBO ,havesomeexcellentproperties,suchaslargenonlinear (NL )coefficients,widewavelengthrangesoftransmission ,andeasilygrowinglargesizecrystalwithhighquality .Thebiaxialcrystalshavebeenextensivelyusedinlaserfr… 相似文献
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1 Introduction Inphotorefractivecrystal,manyapplications,suchasimageamplificationandimagestorage ,needtousethepropertyofhighdiffractionefficiency .Someauthors[1] havereferredthathighdiffractionefficiencyinphotorefractiveLiNbO3crystalcanbeobtainedbywriting… 相似文献
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本文采用对角化三角场中d5组态完全能量矩阵的方法,研究了KZnF3Fe3+体系的局域晶体结构和EPR参量之间的关系.在分析中我们引入了双层配位模型,即配位体包括Fe3+离子最近邻的6个F-离子和次近邻的8个K+离子.计算表明KZnF3Fe3+的局域结构畸变源于一个K+离子沿C3轴方向(即[111]方向)向Fe3+离子的移动,从而诱导F-离子的位移,使得Fe3+-F-键与C3轴夹角发生变化.通过计算EPR的低对称参量D和(a-F),我们分别得出室温(T=300K)时的畸变角为△θ1=2.58°,△θ2=-1.4°和低温(T7=77 K)时畸变角为△θ1=2.85°,△θ2=-1.40计算结果与实验观察值△θ1=2.8±0.3°,△θ2=-1.1±0.3°相符合. 相似文献
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LIANG Zhongcheng MING Hai ZHANG Jiangying LONG Yunze XIA Yong XIE Jianping ZHANG Qijin SHEN Weilun 《Chinese Journal of Lasers》2000,9(3):254
Polymerliquidcrystals(PLC)withazobenzenemoietiesarepromisingmaterialsforopticalswitchingandimagestoragebecausetheorientationofmesogensinthinfilmsofthismaterialmaybemodifiedbylight.Recently,wefoundthatthereorientationofazobenzenemesogenscanbeachievedbyt… 相似文献
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本文在E_d=0.1—2.5MeV能量范围内,研究了Be~9(d,p_0)Be~(10)(0),Be~9(d,p_1)Be~(10)(3.368MeV),Be~9(d,t_0)Be~8(0),Be~9(d,α_0)Li~7(0)及Be~9(d,α_1)Li~7(0.478MeV)诸反应。在E_d=0.150,0.220,0.401,0.706,1.005,1.301,1.484,1.750,2.000,2.250和2.500MeV共十一个能量上分别测量了这五群出射粒子在θ_L=10—155°区间的角分布。在θ_L=135°,E_d=0.1—2.5MeV,在θ_L=95°,E_d=0.1—2.2MeV,和在θ_L=112.5°,E_d=0.5—2.5MeV测量了Be~9(d,p_0)Be~(10)的激发函数。在θ_L=135°和112.5°,E_d=1.2MeV,用较厚靶(100—300μg/cm~2)测量了Be~9(d,p_0)Be~(10)(0)反应的截面绝对值,结果为σ_p_0(θ_L=135°)=1.60mb/sr,σ_p_0(θ_L=112.5°)=1.55mb/sr。这样就得到了在此能区内,这五群出射粒子的截面情况。对所得结果进行了一些讨论。 相似文献
16.
Al2O3:Fe3+体系晶格局域结构的EPR理论研究 总被引:3,自引:1,他引:2
本文通过分析Al2O3∶Fe3+体系中Fe3+离子的EPR谱,研究Fe3+的局域晶体结构结果表明Al2O3∶Fe3+的局域结构存在各向异性膨胀.用拟合EPR谱的低对称参量D和(a-F)实验值的方法,求得两个三棱锥的棱与C3轴的夹角分别为θ1=46.54°和θ2=61.26°,相对于原Al2O3结构的畸变角分别是Δθ1=-1.1°±0.1°,Δθ2=-1.8°.两畸变角同时均小于0说明Al2O3∶Fe3+体系中含Fe3+离子的晶格主要产生沿C3轴的伸长畸变. 相似文献
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《物理》2000,29(10)
1 Phase sensitiveX rayimaging(RichardFitzger ald .Phys .Today ,2 0 0 0 ,No .7)2 AhistoricalperspectiveonCopenhagen (DavidC .Cassidy .Phys .Today ,2 0 0 0 ,No .7)3 TheGermanuranium project(HansA .Bethe .Phys.Today ,2 0 0 0 ,No .7)4 WernerHeisenbergandAlbertEinstein(GeraldHolton .Phys.Toda… 相似文献
18.
1 Introduction Therapiddevelopmentofhigh powerdiodelasershasresultedinthesearchformoreefficientsolid statelasermaterialsforvariousapplications.Thelaseremissionfromthe4F3 / 2 4I11/ 2 transitionofNd3 + ionshasbeenobservedinavarietyofNd dopedcrystalsusingflashlam… 相似文献
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LIU Junhai WANG Jiyang SUN Lianke SHAO Zongshu JIANG Minhua 《Chinese Journal of Lasers》2001,10(1):1-5
1 Introduction Self frequency doublinglasercrystals,whichcombinetwodifferentfunctionsoflaseremissionandfrequencyconversion ,provideasimplewayofgeneratingcoherentvisibleradiation .Amongthevariousself frequency doublingcrystals ,neodymiumyttriumaluminumbora… 相似文献
20.
6 电偶极振子的Ec 线图图 2中F(r,π/2 ,t)图线的零点 ,极值点、拐点等反映了什么 ?为说明这些问题我们需先作电偶极振子的Ec 线图 .在 φ =φ0 (定值 )的平面内 ,Ec 线满足的微分方程是drEcr=rdθEcθ将式 ( 4)代入上式 ,消去相同因子 ,得dr2cosθ=rdθsinθ即 drr =2 cosθdθsinθ =d(sin2 θ)sin2 θ解上式得 1rsin2 θ=恒量 ( 1 4′)或 G(r,θ) =1krsin2 θ=K(恒量 ) ( 1 4 )式 ( 1 4 )中k仍为 wc,值得注意Ec 线形状不随时间变化 .用类似于求E线的作图法画出E… 相似文献