Structural, thermal, and luminescent properties of Yb-doped Y₃Al₅O₁₂ crystals

Abstract

Yb-doped ${\mathrm{Y}}_3{\mathrm{Al}}_5{\mathrm{O}}_{12}$ (Yb:YAG) single crystals were grown by the Czochralski method. The effects of various ${\mathrm{Yb}}^{3+}$ concentrations on structural distortion, density, and thermal expansion of Yb:YAG laser crystals are discussed. The fluorescence spectra, fluorescence lifetimes, and color-center absorption spectra of as-grown and annealed Yb:YAG with various doping levels were measured at room temperature. The effects of color centers on the fluorescence intensity and lifetime of Yb:YAG were also investigated.

© 2004 Optical Society of America

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