Spectroscopic investigations of Pr³⁺/Er³⁺:CaYAlO₄ crystal for 2.7 ¦Ìm emission

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• 作者：Shaozhen Lv ; Zhaojie Zhu ; Yan Wang ; Zhenyu You ; Jianfu Li ; Jianghe Feng ; Chaoyang Tu
• 关键词：Mid-infrared emission ; CaYAlO4 crystal ; Spectra characteristics
• 刊名：Optical Materials
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：35
• 期：9
• 页码：1623-1626
• 全文大小：299 K

文摘

In this paper, we report on the 2.7 ¦Ìm mid-infrared emission performance under 974 nm excitation in Pr³⁺/Er³⁺ co-doped CaYAlO₄ crystal. It is found that with the presence of Pr³⁺ ion, the green, red up-conversion and the near-infrared emission are almost quenched. Besides, the laser lower level ⁴I_13/2 depopulated much faster than the upper level ⁴I_11/2. That indicates the population inversion become easier and the self-saturation for the transition ⁴I_11/2 ¡ú ⁴I_13/2 of Er³⁺ ion become weaker than that in Er³⁺:CaYAlO₄ crystal. The energy transfer mechanism and the energy transfer coefficients are calculated and discussed. All the results imply that Pr³⁺ codoping benefits to achieving 2.7 ¦Ìm laser in Pr³⁺/Er³⁺:CaYAlO₄ crystal.