近年来随着光电技术应用需求的增长, 诸如平面激光诱导荧光技术、激光探测和激光加工等越来越多的领域展现出对高重频大能量的脉冲激光的需求。然而受激光器平均功率的限制, 传统的连续脉冲模式的脉冲激光器难以实现高重频和大能量的兼顾输出。文中研究了一种LD泵浦Nd:YAG 1.06 μm脉冲串激光器及其放大系统。采用长脉冲泵浦、腔内调制和MOPA放大技术, 实现了一段时间内激光器的高重频和大能量的兼顾输出。在调Q重频分别为10、50、100 kHz时, 脉冲串能量分别达到170.4、211.8、220.3 mJ, 每串内分别包含2个、12个、25个脉冲, 单脉冲能量分别为85.2、17.7、8.8 mJ。

In recent years, with the increasing demand for optoelectronic technology applications, more and more fields such as Plane Laser Induced Fluorescence, laser detection and laser processing have shown the demand for high-repetition-rate and high-energy pulsed lasers. However, due to the limitation of average power, it is difficult for the conventional continuous pulsed lasers to achieve pulsed laser output with high repetition rate and high energy. In this paper, an LD-pumped 1.06 μm Nd:YAG burst-mode laser and its amplification system were studied and demonstrated. By employing long pump duration, burst-mode technique, and MOPA amplification scheme, the laser output with high repetition rate and high energy was obtained in the burst duration. After dual-stage amplification, the burst energy reached 170.4, 211.8, and 220.3 mJ at Q-switching repetition rate of 10, 50, and 100 kHz, containing 2, 12 and 25 pulses in one pump duration, respectively. The single pulse energy reached 85.2, 17.7, and 8.8 mJ, respectively.