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Appl Opt. 2005 May 20;44(15):3117-24.

Influence of fluorescence reabsorption and trapping on solid-state optical cooling.

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  • 1MetroLaser, Incorporated, Irvine, California 92614, USA.


We analyze the random process of fluorescence reabsorption and trapping in solid-state optical materials in general and its influence on the efficiency of optical cooling of solids by anti-Stokes fluorescence in particular. Using the absorption and fluorescence spectra of Yb3+:ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) as input data, we employ a random-walk model to test analytical approximations of the fluorescence escape efficiency and cooling efficiency, including reflections at the boundary.

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