Optical properties and parameters of Dy3+-doped YAl3(BO3)4 crystals

The crystal of Dy3+-doped YAl3(BO3)4 (Dy:YAB) has been grown by top-seeded solution growth method. The dispersion parameters of the refractive indices are measured and fitted by the least-squares method. Optical absorption and emission intensities of Dy3+ ions in YAB are investigated. Based on the Judd-Ofelt theory, the spectral parameters: intensity parameters Ωt, radiative transition probabilities AJ,J′, oscillator strengths fJ,J′ and the radiative lifetime of selected levels, have been obtained. The value of integrated emission cross section was also calculated. The results indicate that Dy:YAB may be considered as laser active materials operating near 2.7, 1.7, and 0.6 μm, respectively.