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Proceedings Paper

Progress towards cryogenic temperatures in intra-cavity optical refrigeration using a VECSEL
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Paper Abstract

We report on the use of a high power InGaAs quantum well vertical external-cavity surface-emitting laser (VECSEL) emitting at a wavelength of 1020 nm for intra-cavity cooling of a 5% Yb-doped YLF crystal to 148 K from room temperature. Similar crystals have now reached temperatures below the NIST-defined cryogenic temperature of 123 K when pumped outside a laser cavity. We discuss the progress, advantages, and challenges of laser cooling inside a VECSEL cavity, including the VECSEL active region design, cavity design, and cooling sample choice for optimal cooling.

Paper Details

Date Published: 11 March 2013
PDF: 6 pages
Proc. SPIE 8638, Laser Refrigeration of Solids VI, 863805 (11 March 2013); doi: 10.1117/12.2005098
Show Author Affiliations
Alexander R. Albrecht, The Univ. of New Mexico (United States)
Mohammadreza Ghasemkhani, The Univ. of New Mexico (United States)
Jeffrey G. Cederberg, Sandia National Labs. (United States)
Denis V. Seletskiy, Univ. Konstanz (Germany)
Seth D. Melgaard, The Univ. of New Mexico (United States)
Mansoor Sheik-Bahae, The Univ. of New Mexico (United States)


Published in SPIE Proceedings Vol. 8638:
Laser Refrigeration of Solids VI
Richard I. Epstein; Denis V. Seletskiy; Mansoor Sheik-Bahae, Editor(s)

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