YAG crystal gradient-doped with Yb3+ ions: growth and properties

Yttrium-aluminum garnet crystals with a gradient distribution of $\mathbf{Y b}^{3+}$ ions (Yb:YAG) were grown using the Czochralski method with liquid recharge. The concentration of $\mathbf{Y b}^{3+}$ ions along the length of the crystal boule varied from 0 to $4 \mathrm{at} . \%$. The subsequent studies showed the existence of a limiting gradient along the length of the crystals connected with formation of the impurities.