中国激光, 2006, 33 (4): 561, 网络出版: 2006-05-17
ZnWO4晶体中Ho3+离子光谱参数计算
Calculation of Spectroscopic Parameters of Ho3+ in ZnWO4 Crystals
材料 激光晶体 光谱 乍得-奥菲而特理论 Ho3+∶ZnWO4晶体 materials laser crystal spectrum theory of Judd-Ofelt Ho3+∶ZnWO4 crystal
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=3.757×10-20 cm2,Ω4=2.089×10-20 cm2,Ω6=4.659×10-20 cm2。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,0.667×10-18 cm2;四能级跃迁系统5S2→5I7的发射截面积为1.200×10-18 cm2,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。
Abstract
It is necessary to research the spectra of Ho3+∶ZnWO4 which is a kind of potential excellent laser crystal. The Ho3+∶ZnWO4 crystals were grown by the technique of Czochralski and its absorption and fluorescence spectra were determined. The phenomenological intensity parameters of Ho3+ in ZnWO4 crystals: Ω2=3.757×10-20 cm2, Ω4=2.089×10-20 cm2, Ω6=4.659×10-20 cm2 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 (0.667×10-18 cm2) of the transition: 5I7→5I8, and the integrated emission cross section (1.200×10-18 cm2), and fluorescence branching ratio (0.3525) of the transition: 5S2→5I7 were calculated out. From these, the transitions of 5I7→5I8 and 5S2→5I7 were pointed out as the laser channels.
臧竞存, 李晓, 单秉锐, 刘燕行, 刘玉龙. ZnWO4晶体中Ho3+离子光谱参数计算[J]. 中国激光, 2006, 33(4): 561. 臧竞存, 李晓, 单秉锐, 刘燕行, 刘玉龙. Calculation of Spectroscopic Parameters of Ho3+ in ZnWO4 Crystals[J]. Chinese Journal of Lasers, 2006, 33(4): 561.