Growth and spectral properties of a new nonlinear laser crystal of Nd3+:Ca9Y0.5La0.5(VO4)7
Growth and spectral properties of a new nonlinear laser crystal of Nd3+:Ca9Y0.5La0.5(VO4)7
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DOI：
10.1016/j.jallcom.2012.09.146
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发表时间：
2013-02
影响因子：
6.2
通讯作者：
Shijia Sun;Zhoubin Lin;Lizhen Zhang;Yisheng Huang;Guo‐fu Wang
中科院分区：
文献类型：
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作者：
Shijia Sun;Zhoubin Lin;Lizhen Zhang;Yisheng Huang;Guo‐fu Wang
用提拉法生长了尺寸为ø 23 × 35 mm 3的掺Nd ~（3+）的Ca_9Y_0.5La_0.5（VO_4）_7晶体。测得Nd ~（3+）离子的有效分凝系数为1.3。用库尔兹功率法测量了它的相对二次谐波效率，其强度是KH_2PO_4晶体的1.5倍。其（100）面和（001）面的维氏硬度分别为408.31和451.72N/mm ~ 2。研究了Nd 3+：Ca9Y0.5La0.5（VO 4）7晶体的光谱性质。应用Judd-Ofelt理论计算了光谱参数。在810 nm处，π偏振态的吸收截面为4.35×10− 20 cm 2，半高宽为12 nm; σ偏振态的吸收截面为5.61×10− 20 cm 2，半高宽为11nm。发射截面π极化为5.02×10− 20 cm 2，σ极化为7.45×10− 20 cm 2。荧光寿命为147μs。结果表明，Nd 3+：Ca9Y0.5La0.5（VO 4）7晶体是一种很有前途的自倍频激光材料。
A Nd3+-doped Ca9Y0.5La0.5(VO4)7crystal with dimensions of ø23×35mm3has been grown by the Czochralski method. The effective segregation coefficient of Nd3+ion is measured as 1.3. Its relative efficiency of second harmonic generation has been measured by the Kurtz power method, the intensity is 1.5times as large as that of KH2PO4crystal. Its Vickers hardness of (100) and (001) faces are 408.31 and 451.72N/mm2, respectively. The spectroscopic properties of Nd3+:Ca9Y0.5La0.5(VO4)7crystal were investigated. The Judd–Ofelt theory was applied to calculate the spectral parameters. The absorption cross sections at 810nm are 4.35×10−20cm2with full width half maximum (FWHM) of 12nm for π-polarization, and 5.61×10−20cm2with FWHM of 11nm for σ-polarization, respectively. The emission section is 5.02×10−20cm2for π-polarization and 7.45×10−20cm2for σ-polarization, respectively. The fluorescence lifetime is 147μs. The results indicate that the Nd3+:Ca9Y0.5La0.5(VO4)7crystal may be a promising candidate of self-frequency-doubling laser material.