Abstract

We report a theoretical scheme for realizing efficient and enhanced laser cooling in Ho3+-doped solids, based on ground-state absorption (GSA) of I58I57 at around 2.07 μm and excited-state absorption (ESA) of I55F55 at around 2.28 μm. The upconversion-quenching-induced heat that usually is found in Ho3+ optical refrigeration can be significantly alleviated by using the copumping scheme, so the cooling power density and the cooling efficiency are greatly improved. The scheme works at temperatures above 133 K, and can shorten the time needed to reach the minimum attainable temperature of the cooling system. Besides, the dopant concentration is allowed to be promoted to around 1%. The copumping scheme can also be applied to other multilevel (such as Tm3+ and Er3+) optical refrigeration systems to improve the cooling performance.

© 2014 Optical Society of America

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Corrections

Dong Guang-Zong and Zhang Xin-Lu, "Efficient and enhanced optical refrigeration beyond 2  μm in Ho3+-doped solids via copumping scheme: erratum," J. Opt. Soc. Am. B 32, 2248-2249 (2015)
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-32-11-2248

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