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Phys. Rev. A 70, 021401(R) (2004) [4 pages]

Experimental demonstration of intracavity solid-state laser cooling of Yb3+:ZrF4-BaF2-LaF3-AlF3-NaF glass

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B. Heeg1,*, M. D. Stone1, A. Khizhnyak1, G. Rumbles1,2,†, G. Mills1,3, and P. A. DeBarber1
1MetroLaser, Inc., 2572 White Road, Irvine, California 92614, USA
2Department of Chemistry, Imperial College of Science, Technology and Medicine, Exhibition Road, London SW7 2AY, United Kingdom
3Ball Aerospace and Technologies Corporation, P.O. Box 1062, Boulder, Colorado 80306, USA

Received 31 March 2004; published 9 August 2004

We report an approach to bulk optical cooling of solid-state materials by placing the cooling medium inside a laser cavity. The laser system is a diode-pumped Yb3+:KY(WO4)2 (KYW) laser, while the cooling medium is an uncoated sample of 2%-doped Yb3+:ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) glass. A typical drop of 6 K from ambient temperature was obtained from a noncontact temperature measurement based on the anti-Stokes luminescence profile, using diode pump power at the gain medium of 6 W, a laser wavelength of 1027 nm, and an absorbed power of 1.25 W.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.021401
DOI:
10.1103/PhysRevA.70.021401
PACS:
78.55.Hx, 07.20.Mc, 33.80.Ps, 42.60.−v

*Author to whom correspondence should be addressed; electronic address: bheeg@metrolaserinc.com

†Present address: Center for Basic Sciences, MS 3216, National Renewable Energy Laboratory, 3216, National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401, USA.

 
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