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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。
Ho3 +: ZnWO4 is a potential excellent laser crystal, which has some value for the study of its spectral properties. The absorption and emission spectra of the crystals were measured by using Ho3 +: ZnWO4 single crystal grown by the method of introducing lead, and the intensity parameter of Ho3 + ions in ZnWO4 crystal was calculated by Judd-Ofelt theory = 3.757 × 10-20cm2, Ω4 = 2.089 × 10-20cm2, Ω6 = 4.659 × 10-20cm2. As a result, the emission lifetime and emission cross-sectional area of the 5I7 → 5I8 transition are 17.08 ms and 0.667 × 10-18 cm 2, respectively. The emission cross-sectional area of the four-level transition system 5S2 → 5I7 is 1.200 × 10-18 cm 2 and the fluorescence branching ratio is 0.3525. It is proposed that 5I7 → 5I8, 5S2 → 5I7 can be used as the laser transition channel for laser experiments.