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Proceedings Paper

Purification of precursors of Yb3+ doped YLF crystals by solvent extraction and electrochemical processing
Author(s): William L. Boncher; Elizabeth Judge; Jose-Maria Sansinena; Matthew R. Dirmyer; Markus P. Hehlen
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Paper 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.

Paper Details

Date Published: 10 March 2015
PDF: 8 pages
Proc. SPIE 9380, Laser Refrigeration of Solids VIII, 938004 (10 March 2015); doi: 10.1117/12.2077235
Show Author Affiliations
William L. Boncher, Los Alamos National Lab. (United States)
Elizabeth Judge, Los Alamos National Lab. (United States)
Jose-Maria Sansinena, Los Alamos National Lab. (United States)
Matthew R. Dirmyer, Los Alamos National Lab. (United States)
Markus P. Hehlen, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 9380:
Laser Refrigeration of Solids VIII
Richard I. Epstein; Denis V. Seletskiy; Mansoor Sheik-Bahae, Editor(s)

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