Tm³⁺-doped Gd₃Ga₅O₁₂ crystal: A potential tunable laser crystal at 2.0 μm

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• 作者：Han Zhou ; Xinghua Ma ; Guitang Chen ; Wancong Lv ; Yan Wang ; Zhenyu You ; Jianfu Li ; Zhaojie Zhu ; Chaoyang Tu
• 关键词：Tm³⁺ ; Gd₃Ga₅O₁₂ crystal growth ; Optical spectroscopies ; Thermal analysis
• 刊名：Journal of Alloys and Compounds
• 出版年：2009
• 出版时间：5 May 2009
• 年：2009
• 卷：475
• 期：1-2
• 页码：555-559
• 全文大小：220 K

文摘

A Tm³⁺-doped Gd₃Ga₅O₁₂ single crystal with a dimension of Ø 25 mm × 20 mm was grown successfully by Czochralski method. The absorption spectrum was recorded at room temperature and used to calculate the absorption cross-section. Based on the Judd–Ofelt (J–O) theory, we obtained three intensity parameters and a series of spectral parameters, such as the radiative probabilities, radiative lifetimes and branch ratios. Room temperature fluorescence spectra and luminescence decay curve were recorded. The stimulated emission cross-section of the ³F₄ → ³H₆ IR transition was calculated. The maximum emission cross-section with the peak at 2.0 μm is 1.05 × 10⁻²¹ cm². The potential laser gain for this transition was also investigated. This crystal is promising as a tunable infrared laser crystal at 2.0 μm.