Publication: Optical spectroscopy of Er3+ and Yb3+ co-doped fluoroindate glasses
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Abstract
Optical absorption, Stokes, and anti-Stokes photoluminescence were performed on Er3+-Yb3+ co-doped fluoroindate glasses. For compounds prepared with a fixed 2 mol % ErF3 concentration and YbF3 contents ranging from 0 to 8 mol %, important upconversion processes were observed as a function of temperature and photon excitation energy. Based on the experimental data, two mechanisms for the upconversion (or anti-Stokes photoluminescence) processes were identified and analyzed in detail. At high Yb contents, the upconversion mechanisms are mostly determined by the population of the 2F5/2 levels of Yb3+ ions (or 4I11/2 levels of Er3+ ions, by energy transfer) regardless of the photon excitation energy and temperature of measurement. Moreover, green and red light emission have similar intensities when a large Yb3+ content is present. © 1998 American Institute of Physics.
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Keywords
Doping (additives), Erbium, Fluorine compounds, Glass, Ions, Light absorption, Light emission, Photoluminescence, Photons, Ytterbium, Fluoroindate glasses, Upconversion processes, Spectroscopy
Language
English
Citation
Journal of Applied Physics, v. 83, n. 4, p. 2256-2260, 1998.
