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.
© 2005 Optical Society of America
Original Manuscript: August 24, 2004
Revised Manuscript: December 19, 2004
Manuscript Accepted: December 27, 2004
Published: May 20, 2005
Bauke Heeg, Peter A. DeBarber, and Garry Rumbles, "Influence of fluorescence reabsorption and trapping on solid-state optical cooling," Appl. Opt. 44, 3117-3124 (2005)