Growth, thermal properties, and LD-pumped 1066 nm laser performance of Nd^3+ doped Gd/YTaO_4 mixed single crystal
Growth, thermal properties, and LD-pumped 1066 nm laser performance of Nd^3+ doped Gd/YTaO_4 mixed single crystal
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DOI：
10.1364/ome.5.002536
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发表时间：
2015-11
影响因子：
2.8
通讯作者：
Fang Peng;Huajun Yang;Qingli Zhang;Jianqiao Luo;D. Sun;Wenpeng Liu;Guihua Sun;R. Dou;Xiaofei Wan
中科院分区：
文献类型：
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作者：
Fang Peng;Huajun Yang;Qingli Zhang;Jianqiao Luo;D. Sun;Wenpeng Liu;Guihua Sun;R. Dou;Xiaofei Wan
采用提拉法生长了高质量的新型激光晶体Nd：Gd0.69Y0.3TaO4（Nd：GYTO）。系统地表征了材料的物理性能，包括密度、比热、热膨胀系数和导热系数。在809 nm处的最大吸收截面和在1066.6 nm处的受激发射截面分别为6.886 × 10−20 cm 2和22 × 10−20 cm 2。荧光寿命为182.4 μs。在1066.5nm波长上获得了2.37W的连续激光输出，光转换效率为36.5%，斜率效率为38%。与Nd：GdTaO_4相比，Nd：GYTO的激光性能得到了提高。这些结果表明Nd：Gd_（0.69）Y_（0.3）TaO_4是一种新型的低对称性激光晶体，在中小功率激光器方面具有很大的潜力。
A new laser crystal Nd:Gd0.69Y0.3TaO4 (Nd:GYTO) with high quality was grown by Czochralski method. The physical properties, including temperature dependent density, specific heat, thermal expansion coefficient, and thermal conductivity, were systematically characterized. The maximum absorption cross section at 809 nm and the stimulated emission cross section at 1066.6 nm are 6.886 × 10−20 cm2 and 22 × 10−20 cm2, respectively. The fluorescence lifetime is measured to be 182.4 μs. Up to 2.37 W of continuous wave (CW) laser operating at 1066.5 nm has been successfully realized, corresponding to an optical conversion efficiency of 36.5% and a slope efficiency of 38%. Compared with Nd:GdTaO4, Nd:GYTO shows an enhancement of the laser performance. These results demonstrate that Nd:Gd0.69Y0.3TaO4 is a novel laser crystal with low symmetry and has great potential as low to moderate power lasers.