Upconversion in YAlO3:Er pumped at 800 nm |
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| Authors: | Th. Weber W. Lüthy H. P. Weber |
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| Affiliation: | (1) Institute of Applied Physics, University of Berne, Sidlerstrasse 5, CH-3012 Berne, Switzerland |
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| Abstract: | Fluorescence at 3  m and 545 nm in a YAlO3:Er (30 at.%) crystal has been measured as a function of wavelength, intensity and polarization for the excitation in the 800 nm wavelength region. Emission at 545 nm is an indicator of losses for 3 m emission due to excited-state absorption and upconversion. The experimental results allow to determine the excitation mechanisms, the upconversion coefficient W2 and the optimum pump wavelengths to generate 3 m radiation. |
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| Keywords: | 42.70.-a 78.20.-e |
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