Poirier, G.Cassanjes, F. C.de Araujo, C. B.Jerez, V. A.Ribeiro, SJLMessaddeq, Younes [UNESP]Poulain, M.2014-05-202014-05-202003-03-15Journal of Applied Physics. Melville: Amer Inst Physics, v. 93, n. 6, p. 3259-3263, 2003.0021-8979http://hdl.handle.net/11449/33599Optical spectroscopic properties of Tm3+-doped 60TeO(2)-10GeO(2)-10K(2)O-10Li(2)O-10Nb(2)O(5) glass are reported. The absorption spectra were obtained and radiative parameters were determined using the Judd-Ofelt theory. Characteristics of excited states were studied in two sets of experiments. Excitation at 360 nm originates a relatively narrow band emission at 450 nm attributed to transition D-1(2)-->F-3(4) of the Tm3+ ion with photon energy larger than the band-gap energy of the glass matrix. Excitation at 655 nm originates a frequency upconverted emission at 450 nm (D-1(2)-->F-3(4)) and emission at 790 nm (H-3(4)-->H-3(6)). The radiative lifetimes of levels D-1(2) and H-3(4) were measured and the differences between their experimental values and the theoretical predictions are understood as due to the contribution of energy transfer among Tm3+ ions. (C) 2003 American Institute of Physics.3259-3263engArtigo10.1063/1.1555674WOS:000181376400021Acesso abertoWOS000181376400021.pdf64460474630346542998503841917815