Spectroscopic properties of thulium ions in bismuth silicate glass  

作　　者：王欣 胡丽丽 李科峰 田颖 凡思军 

机构地区：[1]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Science [2]Graduate Universitiy of Chinese Academy of Science,Beijing 100049,China

出　　处：《Chinese Optics Letters》2012年第10期44-48,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 60937003);GFfoundation (No. GXJJ-11-M23).

摘　　要：A new type of bismuth silicate glass （Bi2O3-SiO2-ZnO-Al2O3-La2O3） doped with Tm2O3 is prepared by melt-quenching method. The thermal stability of the glass is examined by differential scanning calorimetry. No crystallization peak is found. Using the absorption and emission spectra, the absorption and emission cross-sections are calculated. Their maximum data are 2.9×10^-21cm^2 at 1663 nm and 4.7×10^-21cm^2 at 1826 nm, respectively. Using the Judd-Ofelt theory, the radiation transition probabilities and radiative lifetimes are obtained. The extended overlap integral method is applied to analyze energy transfer process among the Tm3＋ ions. The transfer constants of cross-relaxation and energy migration among the Tm^3＋ ions at the 3H4 level are 7.60×10^-40 and 14.98×10^-40 cm^6 /s, respectively. The critical transfer radius for cross-relaxation is 0.99 nm. The cross relaxation process is easy to realize and is favorable for obtaining ～2-μm laser.A new type of bismuth silicate glass （Bi2O3-SiO2-ZnO-Al2O3-La2O3） doped with Tm2O3 is prepared by melt-quenching method. The thermal stability of the glass is examined by differential scanning calorimetry. No crystallization peak is found. Using the absorption and emission spectra, the absorption and emission cross-sections are calculated. Their maximum data are 2.9×10^-21cm^2 at 1663 nm and 4.7×10^-21cm^2 at 1826 nm, respectively. Using the Judd-Ofelt theory, the radiation transition probabilities and radiative lifetimes are obtained. The extended overlap integral method is applied to analyze energy transfer process among the Tm3＋ ions. The transfer constants of cross-relaxation and energy migration among the Tm^3＋ ions at the 3H4 level are 7.60×10^-40 and 14.98×10^-40 cm^6 /s, respectively. The critical transfer radius for cross-relaxation is 0.99 nm. The cross relaxation process is easy to realize and is favorable for obtaining ～2-μm laser.

关 键 词：BISMUTH Chemical bonds Differential scanning calorimetry Emission spectroscopy Energy transfer Glass Lanthanum oxides Molecular orbitals SILICATES Wave functions Zinc oxide 

分 类 号：TQ171.1[化学工程—玻璃工业]