Bueno, Luciano A. [UNESP]Gomes, Anderson S.L.Messaddeq, Younes [UNESP]Santilli, Celso Valentim [UNESP]Dexpert-Ghys, JeanetteRibeiro, Sidney José Lima [UNESP]2014-05-272014-05-272005-07-15Journal of Non-Crystalline Solids, v. 351, n. 21-23, p. 1743-1746, 2005.0022-3093http://hdl.handle.net/11449/68340Two series of glasses with composition (mol%) 70PbGeO3- 15PbF2-15CdF2, the first one with different Tm 3+ contents (0.2, 0.4, 0.6 and 0.8 mol%) and the second one with 0.2 mol% Tm3+ and different Ho3+ contents (0.1, 0.5, 1.0 and 1.5 mol%), have been prepared and some of their spectroscopic properties studied. Absorption in the visible-near infrared and emission in the near infrared region of the electromagnetic spectrum have been obtained. Concerning emission at the 1.4-1.5 μm region, optimization of rare earth ions content leads to 0.2 and 0.5 mol% for Tm3+ and Ho3+, respectively. We discuss potential application of these compositions. © 2005 Elsevier B.V. All rights reserved.1743-1746engAbsorptionCompositionElectromagnetismFiber lasersGermanium compoundsNuclear magnetic resonancePhotodiodesRaman scatteringSpectroscopic analysisElectromagnetic spectrumFluorogermanate glassesRare earth ionsSpectroscopic propertiesMetallic glassTrabalho apresentado em evento10.1016/j.jnoncrysol.2005.04.007WOS:000230574700004Acesso aberto2-s2.0-211444517062998503841917815558429868187086564460474630346540000-0003-3286-94400000-0002-8356-8093