采用熔盐提拉法生长出φ20min×35mm的优质Nd3+:KGd(WO4)2晶体,对晶体三个轴向的光谱进行了测试研究,结果表明a轴向的吸收和荧光谱峰最强,最适合于进行激光实验研究.采用脉冲氙灯泵浦φ3.5mm×26mm的激光器件,在1.067μm处得到125.5mJ的激光输出.在同等条件下对YAG:Nd激光晶体进行了激光实验研究,并对两种结果进行了比较,结果表明:和YAG:Nd3+晶体相比,KGW:Nd3+晶体具有激光阈值低、效率高和输出光为偏振光等优点,因此在小型激光器的应用方面具有明显的优势.
The crystal of Nd3+:KGd(WO4)2 with the size of φ20mm×35mm was grown by using the modified CZ.
method. The absorption and emission spectra in the directions of a, b and c axes were measured, the result shows that the intensity of absorption
and emission spectra in the direction of a axis is the strongest. Therefore, the direction of a axis is the most suitable for laser experiment. A laser
output of 125.5 mJ at 1.067μm was obtained when a laser crystal with the size of φ3.5mm×26mm was pumped by a Xe lamp. Compared with the
YAG:Nd3+ laser crystal, which was performed the same laser experiment at the same conditions, Nd3+:KGd(WO4)2 has the advantages of lower
laser threshold and higher efficiency as well as the polarized laser output. Therefore, it is expected that Nd3+:KGd(WO4)2 crystal will be very
useful in the miniature laser.
参考文献
| [1] | Pujol M C, Rico M, Zaldo C, et al. Applied Physics, 1999, B68: 187--197. [2] 藏竟存, 詹永玲. 光电子·激光, 1997, 8 (2): 90--93. [3] 涂朝阳, 李坚富, 朱昭捷, 等. 人工晶体学报, 2001, 30 (2): 135--139. [4] Schulz-Dubios E O. J. Crystal Growth, 1972, 12: 81--87. |
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