Multiphonon relaxation and infrared-to-visible conversion of Er3+ and Yb3+ ions in barium-thorium fluoride glass

Multiphonon relaxation and infrared-to-visible conversion of Er3+ and Yb3+ ions in barium-thorium fluoride glass

The upconversion of infrared radiation into green and red fluorescence has been studied for Er3+ and Yb3+ ions in BaF2/ThF4 fluoride glass over a wide temperature range and several dopant concentrations. At room temperature an upconversion efficiency of 3.3×10−5 has been obtained for the green emiss...

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Veröffentlicht in:Journal of applied physics 1987-07, Vol.62 (1), p.266-275
Hauptverfasser: YEH, D. C, SIBLEY, W. A, SUSCAVAGE, M, DREXHAGE, M. G
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Exact sciences and technology
Other techniques and industries
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container_title Journal of applied physics
container_volume 62
creator YEH, D. C
SIBLEY, W. A
SUSCAVAGE, M
DREXHAGE, M. G
description The upconversion of infrared radiation into green and red fluorescence has been studied for Er3+ and Yb3+ ions in BaF2/ThF4 fluoride glass over a wide temperature range and several dopant concentrations. At room temperature an upconversion efficiency of 3.3×10−5 has been obtained for the green emission from the glass with 1 mol % ErF3 and 19 mol % YbF3 pumped by 973-nm radiation with intensity of 16.5 mW/cm2. For an absorbed intensity of 10 W/cm2 the efficiency for green upconversion emission is predicted to be 2%. Radiative transition rates for the excited states of Er3+ were calculated using Judd–Ofelt theory and intensity parameters obtained from measured integrated absorption coefficients. The calculated values of the multiphonon relaxation and the upconversion fluorescence intensity, obtained from the rate equation model of Wright, are discussed in light of the experimental results.
doi_str_mv 10.1063/1.339139
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Other techniques and industries
title Multiphonon relaxation and infrared-to-visible conversion of Er3+ and Yb3+ ions in barium-thorium fluoride glass
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