Optical properties of Dy:YCa4O(BO3)3 crystal grown by the Czochralski technique

Abstract Dy 3+ -doped YCa 4 O(BO 3 ) 3 (Dy:YCOB) crystal was successfully grown by the Czochralski technique. The absorption cross section at 453 nm was 0.28 × 10 –21 cm 2 , that is related to the 6 H 15/2 → 4 I 15/2 transition. The Judd-Ofelt parameters Ω t (t = 2, 4, 6) were 1.62 × 10 –20 , 0.10 × 10 –20 , 0.41 × 10 –20 cm 2 , respectively. The emission cross section assigned to the transition 4 F 9/2 → 6 H 13/2 was 1.02 × 10 –21 cm 2 . The 4 F 9/2 energy level’s fluorescence lifetime was 900 μ s.