LAERCIO GOMES
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Artigo IPEN-doc 22830 The basic spectroscopic parameters of Ho3+-doped fluoroindate glass for emission at 3.9 μm2016 - GOMES, LAERCIO; FORTIN, VINCENT; BERNIER, MARTIN; VALLEE, REAL; POULAIN, SAMUEL; POULAIN, MARCEL; JACKSON, STUART D.This report details the first study of the fundamental spectroscopic properties of a new optical material for prospective application as a gain medium for fiber laser emission at 3.9 mm. We have investigated the decay processes that are relevant to the excited states of the 5I5 / 5I6 transition in singly Ho3þ-doped InF3 (fluoroindate) glass using time-resolved fluorescence spectroscopy. The HoF3 concentration in the glass was 10 mol.%. We excited the 5I7 and 5I6 energy levels using selective excitation at 1982 nm and 1150 nm, respectively.We have established that a strong energy-transfer upconversion process by way of the well-known dipole-dipole interaction between two holmium ions excited to the 5I6 level populate the 5I5 (upper laser) level of the 3.9 mm transition. The 5I6 and 5I5 energy levels emit luminescence with measured peaks located at 2.85 mm and 3.92 mm, respectively and the luminescence efficiencies of these emissions are 78% and 0.2%, respectively. Results from numerical simulations show that for this high Ho3þ concentration, a population inversion for the 3.9 mm transition is reached only for a short time (t < 100 μs) after direct upper laser level pumping at a wavelength of 889 nm.Artigo IPEN-doc 21758 Luminescence properties of Yb:Er:KYsub(3)Fsub(10) nanophosphor and thermal treatment effects2016 - GOMES, LAERCIO; LINHARES, HORACIO M. da S.M.D.; ICHIKAWA, RODRIGO U.; MARTINEZ, LUIS G.; BALDOCHI, SONIA L.Artigo IPEN-doc 21330 Synthesis, characterization and luminescence properties of Eusup(3+)-doped hydroxyapatite nanocrystal adn the thermal treatment effects2015 - SILVA, FLAVIA R.O.; LIMA, NELSON B. de; BRESSIANI, ANA H.A.; COURROL, LILIA C.; GOMES, LAERCIOArtigo IPEN-doc 21268 Energy transfer and energy level decay processes of Ersup(3+) in water-free tellurite glass2015 - GOMES, LAERCIO; RHONEHOUSE, DANIEL; NGUYEN, DAN T.; ZONG, JIE; CHAVEZ-PIRSON, ARTURO; JACKSON, STUART D.Artigo IPEN-doc 12268 Spectroscopic study of tetracycline-lanthanides complexes for biomedical applications2005 - COURROL, LILIA C.; SILVA, FLAVIA R. de O.; TARELHO, LUIS V.G.; GOMES, LAERCIO; VIEIRA JUNIOR, NILSON D.Capítulo IPEN-doc 13636 Energy-transfer processes in high power Yb:Tm:YLF lasers emitting at 2.3 um2008 - MATOS, PAULO S.F. de; WETTER, NIKLAUS U.; GOMES, LAERCIO; RANIERI, I.M.; BALDOCHI, SONIA L.Resumo IPEN-doc 14437 Growth and characterization of BaYsub(2)Fsub(8):Nd:Dy2007 - CRUZ, S.F.A.; GOMES, L.; BALDOCHI, S.L.Resumo IPEN-doc 10374 Spectroscopic characterization of ejected dental tissue by Er:YAG lases2001 - COURROL, L.C.; ZEZELL, D.M.; SAMAD, R.E.; GOMES, L.Resumo IPEN-doc 02891 Espectroscopia do Nd:YLF sob excitacao com laser de diodo1996 - COURROL, L.C.; MALDONADO, E.P.; GOMES, L.; VIEIRA JUNIOR, N.D.; RANIERI, I.M.; MORAES, N.M.P.; MORATO, S.P.Resumo IPEN-doc 05554 Modelo de acao laser do Ho:YLF em 2065 NM utilizando-se parametros espectroscopicos fundamentais1994 - GOMES, L.; TARELHO, L.V.G.; CAMARGO, M.B.; RANIERI, I.M.; ZEZELL, D.M.; ROSSI, W.; COSTA, F.E.; MORATO, S.P.