KASSAB, L.R.P.COURROL, L.C.CACHO, V.D.D.TATUMI, S.H.WETTER, N.U.GOMES, L.MORIMOTO, N.I.2014-11-172014-11-182015-04-022014-11-172014-11-182015-04-02KASSAB, L.R.P.; COURROL, L.C.; CACHO, V.D.D.; TATUMI, S.H.; WETTER, N.U.; GOMES, L.; MORIMOTO, N.I. GeOsub(2)-PbO-Bisub(2)Osub(3) glasses doped with Ybsup(3+) for laser applications. In: BRAZILIAN SYMPOSIUM OF GLASSES AND RELATED MATERIALS, 6th; INTERNATIONAL SYMPOSIUM ON NON-CRYSTALLINE SOLIDS IN BRAZIL, 2nd, Sep. 21-25, 2003, Campos do Jordao, SP. <b>Proceedings...</b> DOI: <a href="https://dx.doi.org/10.1016/j.jnoncrysol.2004.08.244">10.1016/j.jnoncrysol.2004.08.244</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/18421.http://repositorio.ipen.br/handle/123456789/18421Glasses of heavy metal oxide GeO2–PbO–Bi2O3 doped with different concentrations of Yb3+ were prepared as materials for IR emission. Absorption and fluorescence emission spectra were measured. The spectroscopic properties and laser parameters are calculated; the disagreement between the reciprocity method and Fuchtbauer–Ladenburg formula in calculations of Yb3+ emission cross-sections is discussed using the radiation trapping effect. GeO2–PbO–Bi2O3 glass doped with Yb3+ is a promising material for laser action at 1021 nm, with properties similar to other known glasses (phosphate and tellurite laser glasses) used as active laser media; the high absorption cross-section (of 1.5 · 10 20 cm2 ) and the large emission bandwidth (of 70 nm) are properties appropriate for short pulse generation.openAccessopenAccesslaserslaser materialsglassgermanium oxideslead oxidesytterbiumoptical propertiesfluorescencespectroscopyTexto completo de evento10.1016/j.jnoncrysol.2004.08.244https://orcid.org/0000-0002-9379-9530