A high-pulse-energy, sub-nanosecond master oscillator power amplifier (MOPA) laser system at 1.06 μm was demonstrated. The thermal effect in laser diode-side-pumped module was studied numerically and experimentally. The master oscillator was an electro-optically Q-switched laser with a pulse width of ~730 ps. Using an end-pumped preamplifier and two-stage side-pumped amplifiers, laser pulses with a pulse energy of 47.1 mJ were obtained at a repetition rate of 500 Hz, corresponding to a peak power of ~64.5 MW. The coefficient of variation of the pulse train was ~4.9%.

中文翻译：

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500 Hz，47.1 mJ亚纳秒MOPA激光系统

演示了1.06μm的高脉冲能量亚纳秒主振荡器功率放大器（MOPA）激光系统。数值和实验研究了激光二极管侧泵模块中的热效应。主振荡器是脉冲宽度约为730 ps的电光调Q激光器。使用端泵前置放大器和两级侧泵放大器，以500 Hz的重复频率获得脉冲能量为47.1 mJ的激光脉冲，对应于〜64.5 MW的峰值功率。脉冲序列的变异系数约为4.9％。