1.Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA
2.Department of Physics & Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
Mansoor Sheik-Bahae (msb@unm.edu)
纸质出版日期:2018,
网络出版日期:2018-06-06,
收稿日期:2018-02-28,
修回日期:2018-04-24,
录用日期:2018-04-24
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First demonstration of an all-solid-state optical cryocooler[J]. LSA, 2018,7(4):128-137.
Hehlen, M. P. et al. First demonstration of an all-solid-state optical cryocooler. Light: Science & Applications, 4, 128-137 (2018).
First demonstration of an all-solid-state optical cryocooler[J]. LSA, 2018,7(4):128-137. DOI: 10.1038/s41377-018-0028-7.
Hehlen, M. P. et al. First demonstration of an all-solid-state optical cryocooler. Light: Science & Applications, 4, 128-137 (2018). DOI: 10.1038/s41377-018-0028-7.
Solid-state optical refrigeration uses anti-Stokes fluorescence to cool macroscopic objects to cryogenic temperatures without vibrations. Crystals such as Yb
3+
-doped YLiF
4
(YLF:Yb) have previously been laser-cooled to 91 K. In this study
we show for the first time laser cooling of a payload connected to a cooling crystal. A YLF:Yb crystal was placed inside a Herriott cell and pumped with a 1020-nm laser (47 W) to cool a HgCdTe sensor that is pa
rt of a working Fourier Transform Infrared (FTIR) spectrometer to 135 K. This first demonstration of an all-solid-state optical cryocooler was enabled by careful control of the various desired and undesired heat flows. Fluorescence heating of the payload was minimized by using a single-kink YLF thermal link between the YLF:Yb cooling crystal and the copper coldfinger that held the HgCdTe sensor. The adhesive-free bond between YLF and YLF:Yb showed excellent thermal reliability. This laser-cooled assembly was then supported by silica aerogel cylinders inside a vacuum clamshell to minimize undesired conductive and radiative heat loads from the warm surroundings. Our structure can serve as a baseline for future optical cryocooler devices.
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