Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 30, Issue 11, Pages 3041-3047Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.30.003041
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Funding
- Specialized Research Fund for the Program for New Century Excellent Talents in University [NCET-11-269]
- National Natural Science Foundation of China [11204048, 61275138, 10804022, 60878016]
- Fundamental Research Funds for the Central Universities [HEUCFZ1221, HEUCFZ1217]
- Special Financial Grant from the China Postdoctoral Science Foundation [2013T60345]
- 111 project to the Harbin Engineering University [B13015]
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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. (C) 2013 Optical Society of America
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