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Type: Artigo de periódico
Title: Fluorescence quantum efficiency of Er3+ in low silica calcium aluminate glasses determined by mode-mismatched thermal lens spectrometry
Author: Sampaio, JA
Gama, S
Baesso, ML
Catunda, T
Abstract: The fluorescence quantum efficiency of Er3+ in low silica calcium aluminate glasses, with nominal composition 58 CaO, 27.1 - x Al2O3, 6.9 MgO, 8 SiO2, x Er2O3, 0.1 <= X <= 1.5 (mol%), melted in air and under vacuum, has been measured using the mode-mismatched thermal lens spectrometry, with excitation beam wavelength at 488 nm and 804 nm. From 0.1 up to 1.1 mol% of Er2O3 the quantum efficiency is around 0.65 for vacuum-melted samples, and around 0.46 for air-melted ones. The quenching of the quantum efficiency appears above 1.3 mol% of Er2O3. The thermal diffusivity was also obtained, with results showing a decrease from 5.69 x 10(-3) cm(2)/s (undoped sample) to 4.78 x 10-3 cm(2)/s (for the highest doped sample, 1.5 mol% of Er2O3). (c) 2005 Elsevier B.V. All rights reserved.
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Non-crystalline Solids. Elsevier Science Bv, v. 351, n. 19-20, n. 1594, n. 1602, 2005.
Rights: fechado
Identifier DOI: 10.1016/j.jnoncrysol.2005.03.047
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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