ZnWO_4晶体中Ho^(3+)离子光谱参数计算  

Calculation of Spectroscopic Parameters of Ho^(3+) in ZnWO_4 Crystals

作　　者：臧竞存[1] 李晓[1] 单秉锐[1] 刘燕行[2] 刘玉龙[3] 

机构地区：[1]北京工业大学材料科学与工程学院 [2]北京工业大学环境与能源工程学院,北京100022 [3]北京工业大学中国科学院物理所,北京100080

出　　处：《中国激光》2006年第4期565-569,共5页Chinese Journal of Lasers

摘　　要：Ho3+∶ZnWO4是一种潜在的优良激光晶体,对其光谱性能的研究具有一定价值。采用引上法生长出光学质量的Ho3+∶ZnWO4单晶,测定了晶体的吸收光谱和发射光谱,利用乍得-奥菲而特(Judd-Ofelt)理论计算出Ho3+离子在ZnWO4晶体中的强度参数Ω2=3.757×10-20cm2,Ω4=2.089×10-20cm2,Ω6=4.659×10-20cm2。由此得到5I7→5I8跃迁的辐射寿命和发射截面积分别为17.08 ms,0.667×10-18cm2;四能级跃迁系统5S2→5I7的发射截面积为1.200×10-18cm2,荧光分支比为0.3525。从而提出5I7→5I8,5S2→5I7可作为产生激光的跃迁通道进行激光实验。It is necessary to research the spectra of Ho^3＋ ： ZnWO4 which is a kind of potential excellent laser crystal. The Ho^3＋ ：ZnWO4 crystals were grown by the technique of Czochralski and its absorption and fluorescence spectra were determined. The phenomenological intensity parameters of Ho^3＋ in ZnWO4 crystals.. Ω2 = 3. 757× 10^-20 cm^2 , Ω4 =2. 089 × 10^-20 cm^2,Ω 6 = 4. 659 × 10^-20 cm^2 were obtained with absorption and fluorescence spectra according to the theory of Judd-Ofelt. Based on these Ωλ values, the radioactive lifetime （17.08 ms）, and integrated emission cross section （0.667×10 ^-18cm^2） of the transition：^5I7→^5I8, and the integrated emission cross section （1. 200× 10^-18 cm^2）, and fluorescence branching ratio （0. 3525） of the transition：^5S2→^5I7 were calculated out. From these, the transitions of s^5I7→^5I8 Is and s ^5S2→^5I7 were pointed out as the laser channels.

关 键 词：材料 激光晶体 光谱 乍得-奥菲而特理论 Ho^3+:ZnWO4晶体 

分 类 号：TN244[电子电信—物理电子学] O433.4[机械工程—光学工程]