Abstract

We present a generalized model for optical refrigeration with Ho3+ doped fluoride crystals in which the dopant concentration dependent upconversion is considered. Based on the spectrum properties of candidate rare-earth ions (Ho3+, Tm3+, and Er3+) for optical refrigeration, a common criterion for upconversion assisted cooling is derived. The cooling performances of Ho3+:YLiF4 crystals are simulated to reveal the practical dopant concentration range for cooling. It is found that the optimal dopant concentration is determined by a balancing consideration of heat loads induced by background absorption and fluorescence quenching. The appropriate pump wavelengths for optical refrigeration with Ho3+:YLiF4 crystals are also indicated.

© 2013 Optical Society of America

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Corrections

Guang-Zong Dong and Xin-Lu Zhang, "Role of upconversion in optical refrigeration: a theoretical study of laser cooling with Ho3+ doped fluoride crystals: erratum," J. Opt. Soc. Am. B 32, 2246-2247 (2015)
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-32-11-2246

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