High-efficiency 50 W burst-mode hundred picosecond green laser

被引：6
|
作者：
Ning Ma [1 ]
Meng Chen [1 ]
Ce Yang [1 ]
Shang Lu [1 ]
Xie Zhang [1 ]
Xinbiao Du [1 ]
机构：
[1] Institute of Laser Engineering, Beijing University of Technology
来源：
High Power Laser Science and Engineering | 2020年 / 8卷 / 01期
基金：
中国国家自然科学基金;
关键词：
all-solid-state laser; high-power laser; second harmonic generation;
D O I：
暂无
中图分类号：
TN248 [激光器];
学科分类号：
0803 ; 080401 ; 080901 ;
摘要：
We report high-energy, high-efficiency second harmonic generation in a near-infrared all-solid-state burst-mode picosecond laser at a repetition rate of 1 kHz with four pulses per burst using a type-I noncritical phase-matching lithium triborate crystal. The pulses in each burst have the same time delay（～1 ns）, the same pulse duration（～100 ps） and different relative amplitudes that can be adjusted separately. A mode-locked beam from a semiconductor saturable absorber mirror is pulse-stretched, split into seed pulses and injected into a Nd:YAG regenerative amplifier. After the beam is reshaped by aspheric lenses, a two-stage master oscillator power amplifier and 4f imaging systems are applied to obtain a high power of ～100 W. The 532 nm green laser has a maximum conversion efficiency of 68%, an average power of up to 50 W and a beam quality factor M;of 3.5.
引用
收藏
页码：5 / 10
页数：6
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