10 March 2015 Purification of precursors of Yb3+-doped YLF crystals by solvent extraction and electrochemical processing
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Proceedings Volume 9380, Laser Refrigeration of Solids VIII; 938004 (2015) https://doi.org/10.1117/12.2077235
Event: SPIE OPTO, 2015, San Francisco, California, United States
Abstract
Optical refrigeration by laser irradiation of YLiF4:Yb3+ (YLF:Yb) crystals has been shown to be strongly deteriorated by impurities, which absorb energy at the laser wavelength, and relax non-radiatively, negating cooling produced from anti-Stokes fluorescence. We aim to increase the efficiency of optical refrigeration through materials purification. We start with the purest sources commercially available and process them in a cleanroom environment. Our method proceeds through electrochemical purification, separating out the transition metal impurities by their redox potentials, and can be scaled up to produce the amounts of material needed for crystal growth.
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William L. Boncher, Elizabeth Judge, Jose-Maria Sansinena, Matthew R. Dirmyer, Markus P. Hehlen, "Purification of precursors of Yb3+-doped YLF crystals by solvent extraction and electrochemical processing", Proc. SPIE 9380, Laser Refrigeration of Solids VIII, 938004 (10 March 2015); doi: 10.1117/12.2077235; https://doi.org/10.1117/12.2077235
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