Journal
OPTICS EXPRESS
Volume 21, Issue 21, Pages 24711-24720Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.024711
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- Natural Sciences and Engineering and Research Council (NSERC) of Canada
- NSERC
- Canada Council for the Arts
- Government of Canada
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We report for the first time the experimental demonstration of optical cooling of a bulk crystal at atmospheric pressure. The use of a fiber Bragg grating (FBG) sensor to measure laser-induced cooling in real time is also demonstrated for the first time. A temperature drop of 8.8 K from the chamber temperature was observed in a Yb:YAG crystal in air when pumped with 4.2 W at 1029 nm. A background absorption of 2.9 x 10(-4) cm(-1) was estimated with a pump wavelength at 1550 nm. Simulations predict further cooling if the pump power is optimized for the sample's dimensions. (C)2013 Optical Society of America
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