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Proceedings Paper

Intracavity optical refrigeration to 131K using high-power vertical external-cavity surface-emitting lasers (VECSELs)
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Paper Abstract

Laser cooling of Yb:YLF crystal to 131 K from room temperature has been demonstrated in an active intracavity arrangement for enhanced pump absorption. The laser is a high-power, broadly-tunable InGaAs/GaAs MQW VECSEL capable of producing 20 Watts at 1020 nm, directly at the E4-E5 transition of the Yb-ion. This is the coldest temperature achieved to date in an intracavity geometry and without sophisticated heat load management of the crystal. This progress presents a significant advancement towards an all-solid-state compact cryocooler.

Paper Details

Date Published: 19 February 2014
PDF: 7 pages
Proc. SPIE 9000, Laser Refrigeration of Solids VII, 900005 (19 February 2014); doi: 10.1117/12.2040116
Show Author Affiliations
Mohammadreza Ghasemkhani, The Univ. of New Mexico (United States)
Alexander R. Albrecht, The Univ. of New Mexico (United States)
Seth D. Melgaard, The Univ. of New Mexico (United States)
Air Force Research Lab. (United States)
Denis V. Seletskiy, The Univ. of New Mexico (United States)
Univ. of Konstanz (Germany)
Jeffrey G. Cedeberg, Sandia National Labs. (United States)
Mansoor Sheik-Bahae, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 9000:
Laser Refrigeration of Solids VII
Richard I. Epstein; Denis V. Seletskiy; Mansoor Sheik-Bahae, Editor(s)

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