Growth and optical properties of Yb3+-doped Ba3Y2(BO3)4 crystal

Yb3+:Ba3Y2(BO3)4 crystals with dimension of ∅20 × 30 mm3 and few cracks have been grown by Czochralski method. Yb3+:Ba3Y2(BO3)4 crystal congruently melts at 1222.7 °C. The strongest absorption band of Yb3+:Ba3Y2(BO3)4 is at 977 nm with an absorption coefficient of 5.8 cm−1 and FWHM of 8 nm. The absorption cross-section of this peak is calculated to be 1.23 × 10−20 cm2. The dominant feature of fluorescence spectrum is a broadband emission, extending from 925 to 1100 nm. The emission cross-section is 8.05 × 10−20 cm2. The radiative lifetime and fluorescence lifetime are 0.587 ms and 0.937 ms, respectively.