Rakov, N.MacIel, G. S.Sundheimer, M. L.De, L.Gomes, A. S. L.Messaddeq, Younes [UNESP]Cassanjes, F. C.Poirier, G.Ribeiro, Sidney José Lima [UNESP]2014-05-272014-05-272002-11-15Journal of Applied Physics, v. 92, n. 10, p. 6337-6339, 2002.0021-8979http://hdl.handle.net/11449/67020We investigated near-infrared-to-blue upconversion from thulium (Tm 3+) doped in tellurite glasses upon continuous wave excitation near 800 nm. We observed an enhancement of over two orders of magnitude of the upconverted emission at ∼480nm when neodymium (Nd 3+) ions were codoped with Tm 3+ ions. For comparison, using a Tm 3+:Nd 3+ codoped fluorozirconate glass as a reference material we observed a 40-fold enhancement of the blue emission. Analysis of the blue emission for samples with different doping levels of Nd 3+ ions showed that energy transfer between Nd 3+ and Tm 3+ is the mechanism responsible for the enhancement in upconversion. © 2002 American Institute of Physics. © 2002 American Institute of Physics.6337-6339engBlue emissionBlue upconversionCo-dopedCo-dopingContinuous WaveDoping levelsFluorozirconate glassOrders of magnitudeReference materialTellurite glassUp-conversionDoping (additives)Energy transferGlassIonsTellurium compoundsThuliumNeodymiumBlue upconversion enhancement by a factor of 200 in Tm 3+-doped tellurite glass by codoping with Nd 3+ ionsArtigo10.1063/1.1515376Acesso aberto2-s2.0-00371130502-s2.0-0037113050.pdf299850384191781564460474630346540000-0003-3286-9440