Optical properties of Nd3+ ions in oxyfluoride glasses and glass ceramics comparing different preparation methods
2004; American Institute of Physics; Volume: 95; Issue: 10 Linguagem: Inglês
10.1063/1.1707204
ISSN1520-8850
AutoresMeritxell Abril, J. Méndez‐Ramos, I.R. Martı́n, Ulises R. Rodríguez‐Mendoza, V. Lavı́n, Agustín M. Delgado-Torres, V.D. Rodrı́guez, P. Núñez, A.D. Lozano-Gorrı́n,
Tópico(s)Solid State Laser Technologies
ResumoA study of optical properties of Nd3+ doped oxyfluoride glasses and glass ceramics prepared by three different methods has been carried out. These methods start from NdF3, Nd2O3, or a Nd3+ ion solution as doping agent. The alternative preparation method based on a preliminary dissolution of the Nd3+ ions is proposed in order to avoid nonhomogeneous dopant distribution and spontaneous devitrification during glass elaboration. In the frame of the Judd–Ofelt theory, main radiative parameters have been studied: transition probabilities, lifetimes, and stimulated emission cross sections. Fluorescence decay curves have been also analyzed in order to study the final distribution of the Nd3+ ions after the ceramming process, discerning between ions that reside in the fluoride nanocrystals precipitated during heat treatment and those remaining in the glassy phase. The NdF3 based glass ceramics present the best values for spectroscopic parameters as the stimulated cross section of the F3/24→I11/24 laser transition.
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