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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Laser cooling of a semiconductor load using a Yb:YLF optical refrigerator

Denis V. Seletskiy, Seth D. Melgaard, Mansoor Sheik‐Bahae, Stefano Bigotta, Alberto DiLieto, Mauro Tonelli

Published Feb 8, 2010• 4 citations
Publisher

Abstract

We demonstrate cooling of a 2 micron thick GaAs/InGaP double-heterostructure to 165 K from ambient using an all-solid-state optical refrigerator. Cooler is comprised of Yb3+-doped YLF crystal, pumped by 9 Watt near E4-E5 Stark manifold transition.
DOI
10.1117/12.845051

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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 19, 2014•2 citations
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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.