Growth and spectroscopic properties of Yb3+:Y0·8La0·2Ca4O(BO3)3 crystal

A Yb3+:Y0·8La0·2Ca4O(BO3)3 crystal with the dimensions of o16 × 20 mm has been grown by the Czochralski method. The absorption and emission cross-sections of the Yb3+:Y0·8La0·2Ca4O(BO3)3 crystals are 1·37 × 10−20 cm2 at 977 nm and 0·64 × 10−20 cm2 at 1033 nm respectively, which are larger than that of Yb3+:YCa4O(BO3)4 and Yb3+:GdCa4O(BO3)4 crystals. It shows that the spectroscopic properties of Yb3+:Y0·8La0·2Ca4O(BO3)4 crystal can be improved by substituting the part La3+ ions for the Y3+ ions in YCa4O(BO3)4 to form mixed YxLa1−xCa4O(BO3)3.