Growth and optical properties of Co,Nd:LaMgAl₁₁O₁₉

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• 作者：Peng Xu^a ; ^b ; ^{xupeng-512@163.com} ; Changtai Xia^a ; ^{xia_ct@siom.ac.cn} ; Juqing Di^a ; ^b ; Xiaodong Xu^c ; Qinglin Sai^a ; ^b ; Lulu Wang^a ; ^b
• 关键词：LaMgAl11O19 ; Self-Q-switched ; Co ; Nd co-doped
• 刊名：Journal of Crystal Growth
• 出版年：2012
• 出版时间：15 December, 2012
• 年：2012
• 卷：361
• 期：Complete
• 页码：11-15
• 全文大小：730 K

文摘

Nd,Co:LaMgAl₁₁O₁₉ (abbreviated as Co,Nd:LMA) was grown using the Czochralski method. The structure, polarized absorption spectrum, fluorescence spectrum, and fluorescence decay time were analyzed. The as-grown crystal had very wide absorption bands at 794 nm, which can be pumped by GaAs laser diode without temperature stabilization. Two strong emission bands were present at 1056 nm and 1082 nm with full-width at half-maximum (FWHM) of 6 and 8 nm, respectively. The large FWHM is due to the inhomogeneity of the Nd ion sites. The lifetimes of the ⁴F_3/2 manifold of Co,Nd:LMA at room temperature monitored at 905 nm, 1056 nm, and 1344 nm were 292, 288, and 350 ¦Ìs, respectively, which was caused by the different contribution of the three different sites with D_3h and C_2v symmetry. The absorption band of Co is from 1.3 ¦Ìm to 1.6 ¦Ìm, and Co,Nd:LMA still has a strong emission around the 1.38 ¦Ìm, indicating that the Co,Nd:LMA can be applied as a potential self-Q-switched material operating at 1.3 ¦Ìm.