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Luo H.,Sichuan University | Luo H.,North Laser Technology Group Co. | Qi L.,Changchun University | Zhu S.-F.,Sichuan University | And 4 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2012

In this paper, the liquid phase synthesis method was used for synthesis of holmium yttrium fluoride barium [molecular formula: Ho3+:BaY2F8, hereinafter referred to as Ho:BYF] polycrystalline raw materials. The laser crystal, barium yttrium fluoride doped with Ho3+ [Ho:BYF] was grown by the Czochralski method with the following parameters: growth speed (0.5-1 mm/h), rotating speed (10 r/min). The result of XRD test shows that the crystal belongs to the monoclinic crystal system and C2/m space group. The crystal absorption and fluorescence spectra were tested, and the absorption coefficient and absorption cross section of Ho3+ on 889 nm were also calculated as follows: respectively 4.84 cm-1 and 1.26×10-21 cm2. The absorption peaks is corresponding to the transition of Ho3+ from the ground state 5I5 to the excited state 5I6, by which 3.9 μm laser output can be carried out.

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