Abstract
Upconversion in MeF2–ErF3 (Me is Ca, Sr, or Ba) crystals with ErF3 concentrations from 0.01 to 10 mol % excited into the IR absorption bands of Er3+ by laser diodes at wavelengths of 808, 978, and 1542 nm is studied. In the case of excitation at λ = 1542 nm, the dominant band in the MeF2–Er emission spectrum corresponds to the 4I11/2–4I15/2 transition at 990 nm, while the contribution of visible bands is less than 0.1. The upconversion luminescence energy yield of MeF2–10% ErF3 crystals excited by 1542-nm radiation with a power density of about 1 W/сm2 varies from 14 to 26%.
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ACKNOWLEDGMENTS
This study was performed using the equipment of the Center for Collective Use for isotope geochemistry studies of the Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences. The authors are grateful to V.A. Kozlovskii for growing the crystals.
Funding
This study was performed within the framework of a state assignment (project IX.125.3.2).
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Translated by M. Basieva
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Radzhabov, E.A., Shendrik, R.Y. Upconversion of Infrared Radiation in Er3+-Doped Alkaline-Earth Fluorides. Opt. Spectrosc. 128, 1752–1757 (2020). https://doi.org/10.1134/S0030400X20110211
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DOI: https://doi.org/10.1134/S0030400X20110211