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Title: First demonstration of an all-solid-state optical cryocooler

Journal Article · · Light, Science & Applications
ORCiD logo [1];  [2];  [2];  [2]; ORCiD logo [2];  [3];  [3];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Physics & Astronomy
  2. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Physics & Astronomy
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Solid-state optical refrigeration uses anti-Stokes fluorescence to cool macroscopic objects to cryogenic temperatures without vibrations. Crystals such as Yb3+-doped YLiF4 (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 part 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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; US Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
AC52-06NA25396; FA9550-15-1-024; FA9550-16-1-0362
OSTI ID:
1457311
Report Number(s):
LA-UR-18-20886
Journal Information:
Light, Science & Applications, Vol. 7; ISSN 2047-7538
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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Cited By (6)

Laser cooling of Yb 3+ :KYW journal January 2020
Optical refrigeration: the role of parasitic absorption at cryogenic temperatures journal January 2019
Observation of optical refrigeration in a holmium-doped crystal journal January 2019
Tm-doped crystals for mid-IR optical cryocoolers and radiation balanced lasers journal January 2019
Observation of Optical Refrigeration in a Holmium-doped Crystal text January 2018
Tm-doped Crystals for mid-IR Optical Cryocoolers and Radiation Balanced Lasers text January 2019

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