caa a22 4500 44537182X CHVBK 20180317142949.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s00340-010-4115-6 doi (NATIONALLICENCE)springer-10.1007/s00340-010-4115-6 Spectroscopic properties of 1.8μm emission of thulium ions ingermanate glass [Elektronische Daten] [R. Xu, Y. Tian, M. Wang, L. Hu, J. Zhang] A new type host of germanate glass (GeO2− BaO−BaF2−Ga2O3−La2O3) codoped with Tm2O3 has been investigated for application as laser material. It possesses a large emission cross section with the value of 9.3×10−21cm2 at 1.8μm. Judd-Ofelt intensity parameters and radiative transition probability are calculated and analyzed by Judd-Ofelt theory and absorption spectra. The infrared emission spectra at 1.8μm have been obtained by using a 794 nm laser diode as excitation resource. The emission intensity ratio of 1.8 (3F4→3H6) to 1.47μm (3H4→3F4) increases, while the experimental lifetime of the Tm3+:3H4 level decreases by increasing Tm2O3 concentration, which is attributed to the presence of a cross relaxation process. The most intensive emission at 1.8μm is achieved from the germanate glass with the concentration of Tm2O3 reaches 1.0 wt%. The extended overlap integral method is used to calculate the microparameter of the energy transfer and the critical distance, which are derived to better understand the energy transfer process of thulium ions in the germanate glass responsible for emission at 1.8μm. Springer-Verlag, 2010 Xu R. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut Tian Y. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut Wang M. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut Hu L. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut Zhang J. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut Applied Physics B Springer-Verlag 102/1(2011-01-01), 109-116 0946-2171 102:1<109 2011 102 340 https://doi.org/10.1007/s00340-010-4115-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-4115-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu R. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Tian Y. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Wang M. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Hu L. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Zhang J. Key Laboratory of Materials for High-power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, People's Republic of China aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/1(2011-01-01), 109-116 0946-2171 102:1<109 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer