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Proceedings Paper

Effect of impurities on cooling efficiency in fluoride crystals
Author(s): Alberto Di Lieto; Alberto Sottile; Azzurra Volpi; Zhonghan Zhang; Mauro Tonelli
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Paper Abstract

We present a characterization of the optical refrigeration properties of two 5% Ytterbium-doped YLF crystals. Measurements showed different cooling efficiencies for the samples, despite the same concentration of dopant. We carried out a spectroscopic study on the crystals devoted to the identification of foreign contaminants inside them. These searches determined the presence of Erbium and Holmium impurities in both the cooling samples. We attributed the reduction of the cooling efficiency in one of the crystals to an increased amount of these contaminants.

Paper Details

Date Published: 19 February 2014
PDF: 8 pages
Proc. SPIE 9000, Laser Refrigeration of Solids VII, 900003 (19 February 2014); doi: 10.1117/12.2038135
Show Author Affiliations
Alberto Di Lieto, Univ. di Pisa (Italy)
Lab NEST, Istituto Nanoscienze, CNR (Italy)
Alberto Sottile, Univ. di Pisa (Italy)
Azzurra Volpi, Univ. di Pisa (Italy)
Zhonghan Zhang, Univ. di Pisa (Italy)
Mauro Tonelli, Univ. di Pisa (Italy)
Lab NEST, Istituto Nanoscienze, CNR (Italy)

Published in SPIE Proceedings Vol. 9000:
Laser Refrigeration of Solids VII
Richard I. Epstein; Denis V. Seletskiy; Mansoor Sheik-Bahae, Editor(s)

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