Purification of precursors of Yb3+ doped YLF crystals by solvent extraction and electrochemical processing

William L. Boncher; Elizabeth Judge; Jose-Maria Sansinena; Matthew R. Dirmyer; Markus P. Hehlen

doi:10.1117/12.2077235

10 March 2015 Purification of precursors of Yb³⁺-doped YLF crystals by solvent extraction and electrochemical processing

William L. Boncher, Elizabeth Judge, Jose-Maria Sansinena, Matthew R. Dirmyer, Markus P. Hehlen

Author Affiliations +

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.

Citation Download Citation

William L. Boncher, Elizabeth Judge, Jose-Maria Sansinena, Matthew R. Dirmyer, and 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); https://doi.org/10.1117/12.2077235

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