caa a22 4500 463226658 CHVBK 20180405153229.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10853-006-1451-3 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1451-3 Upconversion emissions in Yb3+-Tm3+-doped tellurite glasses excited at 976nm [Elektronische Daten] [Guonian Wang, Shixun Dai, Junjie Zhang, Jianhu Yang, Zhonghong Jiang] Intense Tm3+ blue upconversion emission has been observed in Tm3+-Yb3+ codoped oxyfluoride tellurite glass under excitation with a diode laser at 976nm. Three emission bands centered at 475, 650 and 796nm corresponding to the transitions 1G4→ 3H6, 1G4→ 3H4 and 3F4→ 3H6, respectively, simultaneously occur. The dependence of upconversion intensities on Tm3+ ions concentration and excitation power are investigated. For fixed Yb2O3 concentrations of 5.0mol%, the maximum upconversion intensity was obtained with Tm2O3 concentration of about 0.1mol%. The blue upconversion luminescence lifetimes of the Tm3+ transitions 1G4→ 3H6 are measured. The results are evaluated by the possible upconversion mechanisms. Springer Science+Business Media, LLC, 2007 Wang Guonian Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut Dai Shixun Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut Zhang Junjie Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut Yang Jianhu Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut Jiang Zhonghong Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/3(2007-02-01), 747-751 0022-2461 42:3<747 2007 42 10853 https://doi.org/10.1007/s10853-006-1451-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1451-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Guonian Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut NATIONALLICENCE 700 1- Dai Shixun Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut NATIONALLICENCE 700 1- Zhang Junjie Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut NATIONALLICENCE 700 1- Yang Jianhu Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut NATIONALLICENCE 700 1- Jiang Zhonghong Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Science, 201800, Shanghai, China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/3(2007-02-01), 747-751 0022-2461 42:3<747 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer