采用金刚石表面冷却的亚纳秒二极管泵浦被动调Q Yb:YAG微芯片激光器的性能增强

Performance enhancement of sub-nanosecond diode-pumped passively Q-switched Yb:YAG microchip laser with diamond surface cooling.

作者信息

Zhuang W Z, Chen Yi-Fan, Su K W, Huang K F, Chen Y F

机构信息

Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan.

出版信息

Opt Express. 2012 Sep 24;20(20):22602-8. doi: 10.1364/OE.20.022602.

DOI:10.1364/OE.20.022602

PMID:23037409

Abstract

We experimentally confirm that diamond surface cooling can significantly enhance the output performance of a sub-nanosecond diode-end-pumped passively Q-switched Yb:YAG laser. It is found that the pulse energy obtained with diamond cooling is approximately 1.5 times greater than that obtained without diamond cooling, where a Cr(4+):YAG absorber with the initial transmission of 84% is employed. Furthermore, the standard deviation of the pulse amplitude peak-to-peak fluctuation is found to be approximately 3 times lower than that measured without diamond cooling. Under a pump power of 3.9 W, the passively Q-switched Yb:YAG laser can generate a pulse train of 3.3 kHz repetition rate with a pulse energy of 287 μJ and with a pulse width of 650 ps.

摘要

我们通过实验证实，金刚石表面冷却可显著提高亚纳秒二极管端面泵浦被动调Q Yb:YAG激光器的输出性能。研究发现，采用初始透过率为84%的Cr(4+):YAG吸收体时，金刚石冷却所获得的脉冲能量比无金刚石冷却时高出约1.5倍。此外，还发现脉冲幅度峰-峰波动的标准偏差比无金刚石冷却时测量的值低约3倍。在3.9 W的泵浦功率下，被动调Q Yb:YAG激光器能够产生重复频率为3.3 kHz的脉冲序列，脉冲能量为287 μJ，脉冲宽度为650 ps。