Yb-doped Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (Yb:YAG) single crystals were grown by the Czochralski method. The effects of various Yb<sup>3+</sup> 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
Xiaodong Xu, Zhiwei Zhao, Pingxin Song, Guoqing Zhou, Jun Xu, and Peizhen Deng, "Structural, thermal, and luminescent properties of Yb-doped Y3Al5O12 crystals," J. Opt. Soc. Am. B 21, 543-547 (2004)