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Optical refrigeration progress: cooling below NIST cryogenic temperature of 123K
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Paper Abstract

We have achieved cryogenic optical refrigeration with a record low temperature in optical refrigeration by cooling 5% wt.Yb:YLF crystal to 119K ±1K (~-154 C) at 1=1020 nm corresponding to its E4-E5 Stark manifold resonance with an estimated cooling power of 18 mW. This demonstration confirms the predicted minimum achievable temperature (MAT). Further cooling is achievable as shown by measurements of a doping study where a 10% wt. Yb:YLF crystal with reduced parasitic heating has predicted cooling below 100K (~-173K).

Paper Details

Date Published: 11 March 2013
PDF: 4 pages
Proc. SPIE 8638, Laser Refrigeration of Solids VI, 863804 (11 March 2013); doi: 10.1117/12.2005281
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)
Univ. Konstanz (Germany)
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. 8638:
Laser Refrigeration of Solids VI
Richard I. Epstein; Denis V. Seletskiy; Mansoor Sheik-Bahae, Editor(s)

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