8 February 2011 Experimental evidence for laser cooling of Yb:YLF to 120 Kelvin
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Proceedings Volume 7951, Laser Refrigeration of Solids IV; 795105 (2011) https://doi.org/10.1117/12.878933
Event: SPIE OPTO, 2011, San Francisco, California, United States
We utilize highly sensitive spectroscopic local temperature probe to ascertain cooling performance of Yb:YLF crystal as a function of wavelength and temperature. A minimum achievable temperature of 120 K is measured at pump wavelength corresponding to E4-E5 Stark manifold transition. Results verify current model for laser cooling cycle as well as demonstrate the lowest temperature achievable by means of optical refrigeration to date.
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Seth D. Melgaard, Denis Seletskiy, Alberto Di Lieto, Mauro Tonelli, Mansoor Sheik-Bahae, "Experimental evidence for laser cooling of Yb:YLF to 120 Kelvin", Proc. SPIE 7951, Laser Refrigeration of Solids IV, 795105 (8 February 2011); doi: 10.1117/12.878933; https://doi.org/10.1117/12.878933

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