Investigation Of Crystal Growth And properties of 2 at%(Ln3+) Doped LiGd(WO4)2 with Ln; Eu, Er and Tm

Spectroscopic and luminescent properties of Europium, Erbium, Thulium doped LiGd(WO4)2 fibers crystal, present high performances for investigation in laser application  . We have successfully grown Eu, Er and Tm-doped... [ view full abstract ]

Spectroscopic and luminescent properties of Europium, Erbium, Thulium doped LiGd(WO₄)₂ fibers crystal, present high performances for investigation in laser application  . We have successfully grown Eu, Er and Tm-doped LiGd(WO₄)₂ single-crystal fiber by the Micro Pulling Down (µ-PD) technique (they melt above 1115°C). The corresponding crystallization interface was flat, with meniscus length equal to the fiber radii. The pulling rate used was in the range of 15 mm h^-1.  Spectroscopic investigations of these rare earth 2% doped fibers are given, the emission spectra recorded in the visible and Infrared domain with fluorescence corresponding to the ¹G₄ →³H₅ and ³F₂  → ³H₆ for the Thulium _, and Europium ⁵D₁ →⁷F₂,⁵D₀  → ⁷F_1-2-3-4, and Erbium ⁴S_3/2 →⁴I_15/2 , ²H_11/2→⁴I_15/2 in visible and  ⁴I_11/2→⁴I_15/2 , ⁴I_13/2→⁴I_15/2 in IR domain, The fluorescence decay times  associated to these intenses transitions were investigated, the Raman vibration in LiGd(WO₄)₂:Ln³⁺ (2 mol % ) single crystal are given at 913 cm^-1 for the highest energy transition.