| 板条激光放大器中寄生振荡的研究 |
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| 引用本文： | 程小劲,徐剑秋.板条激光放大器中寄生振荡的研究[J].光学学报,2007,27(10):1827-1830. |
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| 作者姓名： | 程小劲 徐剑秋 |
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| 作者单位： | 中国科学院上海光学精密机械研究所,上海,201800;中国科学院上海光学精密机械研究所,上海,201800 |
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| 基金项目： | 国家自然科学基金(60678016)资助课题 |
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| 摘 要： | 寄生振荡的存在使得放大器在信号光到达之前消耗了大量的反转粒子数,降低了放大器的激光增益和储能效率,严重地影响了激光放大器的性能,尤其对高功率激光放大器。在理论分析和实验研究的基础上,以Nd∶YAG晶体板条为例,用8条半导体激光阵列对晶体进行双侧抽运,研究了高功率激光放大器的寄生振荡现象,分析了板条晶体寄生振荡产生的原因,并详细比较了晶体在不同的抽运功率和表面处理下的放大效果,得到了2倍的单程放大,当输入能量为140 mJ时,获得了278 mJ的激光输出。
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| 关 键 词： | 固体激光器 半导体激光抽运 板条晶体 寄生振荡 |
| 文章编号： | 0253-2239（2007）10-1827-4 |
| 收稿时间： | 2007/1/19 |
| 修稿时间： | 2007-01-19 |
Research on Parasitic Oscillation in Slab Amplifiers |
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| Cheng Xiaojin,Xu Jianqiu.Research on Parasitic Oscillation in Slab Amplifiers[J].Acta Optica Sinica,2007,27(10):1827-1830. |
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| Authors: | Cheng Xiaojin Xu Jianqiu |
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| Institution: | Shanghai Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, Shanghai 201800 |
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| Abstract: | Existence of parasitic oscillation makes the amplifier consume lots of inversed population before the arrival of signal pulse, which reduces peak gain and storage efficiency and influence amplification performance greatly, especially for high-power amplifiers. By pumping Nd∶YAG slab with 8 laser diode arrays, parasitic oscillation in high-power amplifier was studied both theoretically and experimentally. The parasitic oscillations in the slab with different surfaces treatment were compared. When the pump energy was 1.28 J and the input pulse energy was 140 mJ, the single-pass amplification of β=2 and the output pulse energy of 278 mJ was obtained. |
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| Keywords: | solid-state lasers laser-diode pumping crystal slab parasitic oscillation |
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