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Proceedings Paper

High sensitivity spectroscopic and thermal characterization of cooling efficiency for optical refrigeration materials
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Paper Abstract

Since recent demonstration of cryogenic optical refrigeration, a need for reliable characterization tools of cooling performance of different materials is in high demand. We present our experimental apparatus that allows for temperature and wavelength dependent characterization of the materials' cooling efficiency and is based on highly sensitive spectral differencing technique or two-band differential spectral metrology (2B-DSM). First characterization of a 5% w.t. ytterbium-doped YLF crystal showed quantitative agreement with the current laser cooling model, as well as measured a minimum achievable temperature (MAT) at 110 K. Other materials and ion concentrations are also investigated and reported here.

Paper Details

Date Published: 8 February 2012
PDF: 4 pages
Proc. SPIE 8275, Laser Refrigeration of Solids V, 827504 (8 February 2012); doi: 10.1117/12.910202
Show Author Affiliations
Seth D. Melgaard, The Univ. of New Mexico (United States)
Denis V. Seletskiy, The Univ. of New Mexico (United States)
Air Force Research Lab. (United States)
Alberto Di Lieto, Univ. di Pisa (Italy)
Mauro Tonelli, Univ. di Pisa (Italy)
Mansoor Sheik-Bahae, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 8275:
Laser Refrigeration of Solids V
Richard I. Epstein; Mansoor Sheik-Bahae, Editor(s)

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