Influence of fluorescence reabsorption on solid fluorescence cooling

The model of fluorescence reabsorption calculation with Monte-Carlo method is proposed, and the fluorescence reabsorption effects of Yb3+:ZBLANP glass are analyzed for a range of sizes. The redshift in the observed fluorescence spectra caused by the fluorescence reabsorption is calculated considering the reflection on the boundary and material size. For cubic Yb3+:ZBLANP glass, the redshift related to the total internal reflection at the surfaces dominates when the material size is small. The redshift of the mean fluorescence wavelength is in the range of 2.6~5.0 nm when the glass size is in the range of 0.1~1.0 cm. The influence of the fluorescence reabsorption on solid fluorescence cooling can be weakened by minishing material size and changing the geometry of the material.