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Radiation-balanced lasers (RBLs) represent a significant application of solid-state laser cooling. Yb3+-doped YAG crystals have been recognized for their dual role in laser technology as a superior gain medium for lasers and as a medium for laser cooling, which make them widely used in the development of high-power RBLs. Here, we focus on the laser cooling properties of 4% Yb3+-doped YAG crystals. We have measured the relative parameters which affect the laser cooing efficiency, including the mean fluorescence wavelength, the resonant absorption coefficient, the external quantum efficiency, and the background absorption coefficient. We explore the cooling efficiency as a function of temperature and wavelength with fixed background absorption coefficient and external quantum efficiency. This comprehensive study has allowed us to obtain the minimum achievable temperature of the sample, which iscalculated to be 231 K. Our work is helpful for the cooling of YAG crystals and the development of RBLs.
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Détails
- Titre original : Spectroscopy and laser-induced cooling characteristics of 4%Yb3+: YAG crystals
- Identifiant de la fiche : 30032629
- Langues : Anglais
- Sujet : Technologie
- Source : 10th IIR Conference on Caloric Cooling and Applications of Caloric Materials
- Date d'édition : 24/08/2024
- DOI : http://dx.doi.org/10.18462/iir.thermag.2024.0021
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