%0 conferenceObject %A JAKUTIS NETO, JONAS %E WETTER, NIKLAUS U. %E BOMFIM, FRANCISCO A. %E MARTINELLI, JOSE R. %E KASSAB, LUCIANA R.P. %E ESCOLA DE VER~AO 'JORGE ANDRE SWIECA' DE OPTICA QUANTICA E OPTICA NAO LINEAR, 11. %D 2014 %T Observation of increasing upconversion luminescence in Ybsup(3+)/Ersup(3+) co-doped PbO-GeOsub(2)-Gasub(2)Osub(3) glasses in a presence of higher ytterbium concentrations %U http://repositorio.ipen.br:8080/xmlui/handle/123456789/19287