caa a22 4500 44537005X CHVBK 20180317142943.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00340-011-4461-z doi (NATIONALLICENCE)springer-10.1007/s00340-011-4461-z Broadband 2 μm emission and energy-transfer properties ofthulium-doped oxyfluoride germanate glass fiber [Elektronische Daten] [R. Xu, Y. Tian, L. Hu, J. Zhang] High near-infrared transparency Tm3+-doped germanate bulk glass and fiber have been fabricated and 2μm emission properties demonstrated. Energy-transfer processes in the germanate glass and fiber are discussed. The emission spectra are obtained from both bulk glass and fiber with the excitation of a 794nm laser diode. The results indicate that the line width of the Tm3+:3F4→3H6 emission spectra measured in fibers is narrower than that of the bulk glass sample and shifts to longer wavelengths with increment of fiber length. The extended overlap integral method is used to calculate the microparameters of energy transfer and critical distance. A model is derived to better understand of the energy-transfer process of thulium ions in the germanate glasses responsible for emission at 2μm. The study indicates that Tm3+-doped germanate fibers with a large core diameter has proved to be promising infrared optical and high-power level laser materials. Springer-Verlag, 2011 Xu R. Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, No. 390 Qinghe Road, Jiading District, 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, No. 390 Qinghe Road, Jiading District, 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, No. 390 Qinghe Road, Jiading District, 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, No. 390 Qinghe Road, Jiading District, 201800, Shanghai, People's Republic of China aut Applied Physics B Springer-Verlag 104/4(2011-09-01), 839-844 0946-2171 104:4<839 2011 104 340 https://doi.org/10.1007/s00340-011-4461-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4461-z 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, No. 390 Qinghe Road, Jiading District, 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, No. 390 Qinghe Road, Jiading District, 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, No. 390 Qinghe Road, Jiading District, 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, No. 390 Qinghe Road, Jiading District, 201800, Shanghai, People's Republic of China aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/4(2011-09-01), 839-844 0946-2171 104:4<839 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer