We report on a RT gain-switched Fe:ZnSe master oscillator power amplifier (MOPA) system tunable over 3.8–5.0 µm pumped by radiation of Er:YAG laser operating at 2.94 µm. The mechanically Q-switched Er:YAG laser with output energy up to 220 mJ was used as a pump source for a master oscillator and three-stage power amplifier. The maximum output energies in 200 ns pulses exceeded 60, 56, and 48 mJ at 4.4, 4.3, and 4.1 µm, respectively, under 220 mJ of pump energy. The extraction energy efficiencies were measured to be 25, 30, and 40% at the first, second, and third stages, respectively.

中文翻译：

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室温，纳秒，60 mJ/脉冲 Fe:ZnSe 主振荡器功率放大器系统，工作在 3.8-5.0 µm

我们报告了一个 RT 增益切换 Fe:ZnSe 主振荡器功率放大器 (MOPA) 系统，该系统可通过工作在 2.94 µm 的 Er:YAG 激光器的辐射泵浦超过 3.8–5.0 µm。输出能量高达 220 mJ 的机械调 Q Er:YAG 激光器用作主振荡器和三级功率放大器的泵浦源。在 220 mJ 泵浦能量下，200 ns 脉冲的最大输出能量分别在 4.4、4.3 和 4.1 µm 时超过 60、56 和 48 mJ。在第一、第二和第三阶段测得的提取能量效率分别为 25、30 和 40%。