期刊
JOURNAL OF LUMINESCENCE
卷 133, 期 -, 页码 5-9出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2011.09.045
关键词
Optical refrigeration; Laser cooling of solids; Cryogenic laser cooling; Yb:YLF; Anti-Stokes luminescence; Derivative spectroscopy
类别
资金
- AFOSR Multi-University Research Initiative Grant entitled Consortium for Laser Cooling in Solids [FA9550-04-1-0356]
- DARPA seedling grant
We measure the minimum achievable temperature (MAT) as a function of excitation wavelength in anti-Stokes fluorescence cooling of high purity Yb3+-doped LiYF4 (Yb:YLF) crystal. Such measurements were obtained by developing a sensitive noncontact thermometry that is based on a two-band differential luminescence spectroscopy using balanced photo-detectors. These measurements are in excellent agreement with the prediction of the laser cooling model and identify MAT of 110 K at 1020 nm, corresponding to E4-E5 Stark manifold transition in Yb:YLF crystal. Published by Elsevier B.V.
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