Energy transfer and upconversion in erbium-ytterbium-doped fluoride phosphate glasses
Date
2002
Authors
Philipps, J.
Topfer, T.
Ebendorff-Heidepriem, H.
Ehrt, D.
Sauerbrey, R.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Applied Physics B: Lasers and Optics, 2002; 74(3):233-236
Statement of Responsibility
J.F. Philipps, T. Töpfer, H. Ebendorff-Heidepriem, D. Ehrt and R. Sauerbrey
Conference Name
Abstract
The energy-transfer rate coefficient from ytterbium to erbium (K) and upconversion rate coefficient for erbium (C) are determined by analysis of erbium fluorescence decay under different pumping conditions. A simple rate-equation model was used to describe the fluorescence dynamics. Numerical analysis of the model delivered K and C as fit parameters to the experimental curves. Values of K ranging from 0.75-1.42 × 10<sup>-16</sup> cm<sup>3</sup>/s and C from 0.8-1.7 × 10<sup>-18</sup> cm<sup>3</sup>/s were found. The results obtained are of the same magnitude as results for phosphate glasses reported in the literature. Further analysis showed that high erbium concentrations (2 × 10<sup>20</sup> cm<sup>-3</sup>) need a much higher pump intensity to reach threshold due to increased losses caused by upconversion.
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The original publication can be found at www.springerlink.com