18 February 2010 Optical refrigeration breaks the Peltier barrier: cooling Yb:YLF to 155K
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Proceedings Volume 7614, Laser Refrigeration of Solids III; 761403 (2010) https://doi.org/10.1117/12.845049
Event: SPIE OPTO, 2010, San Francisco, California, United States
Abstract
We demonstrate first cryogenic operation in a Ytterbium doped YLF crystal by means of an optical refrigeration. We have achieved cooling to 155 Kelvin absolute temperature with heat lift of 90 mW, exceeding performance of multi-stack thermo-electric coolers. This progress was possible by pumping the system near the Stark-manifold resonance of highly pure Yb:YLF crystal and careful thermal management in the cooling experiment. Detailed spectroscopic analysis demonstrated that cooling to 110 Kelvin is currently possible if pumped exactly on that resonance.
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Denis V. Seletskiy, Denis V. Seletskiy, Seth D. Melgaard, Seth D. Melgaard, Mansoor Sheik-Bahae, Mansoor Sheik-Bahae, Stefano Bigotta, Stefano Bigotta, Alberto DiLieto, Alberto DiLieto, Mauro Tonelli, Mauro Tonelli, Richard I. Epstein, Richard I. Epstein, "Optical refrigeration breaks the Peltier barrier: cooling Yb:YLF to 155K", Proc. SPIE 7614, Laser Refrigeration of Solids III, 761403 (18 February 2010); doi: 10.1117/12.845049; https://doi.org/10.1117/12.845049
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