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| 泵浦匀化对Innoslab激光放大器光束质量的改善 | |
| 引用本文： | 何涛, 陈小明, 鲁燕华, 等. 泵浦匀化对Innoslab激光放大器光束质量的改善[J]. 强激光与粒子束, 2020, 32: 011019. doi: 10.11884/HPLPB202032.190277 |
| 作者姓名： | 何涛 陈小明 鲁燕华 张彬 徐浏 叶先林 许夏飞 |
| 作者单位： | 1.四川大学 电子信息学院，成都 610065;;2.中国工程物理研究院 应用电子学研究所，四川 绵阳 621900;;3.中国工程物理研究院 高能激光科学与技术重点实验室，四川 绵阳 621900 |
| 基金项目： | 国家自然科学基金项目(61705208) |
| 摘 要： |  针对结构紧凑的部分端面泵浦混合腔板条激光放大器，研究了泵浦匀化对其输出激光光束质量的改善作用。基于ZEMAX仿真软件，设计并对比分析了直接成像和波导匀化后再成像两种泵浦耦合方式对激光二极管阵列慢轴（晶体宽度）方向光强分布均匀性的影响，发现波导匀化后泵浦均匀性得到明显提升且激光二极管阵列发光坏点对泵浦成像的影响得以弱化。进一步实验验证了泵浦匀化对Innoslab激光放大器性能的改善作用：波导匀化后慢轴方向泵浦均匀度从90.6%提高到95.4%，进而使3通放大后输出激光光束质量因子M2从2.41提升到1.55，并且有效抑制了多通放大腔内的自激振荡。 |
| 关 键 词： | Innoslab激光放大器 波导匀化 泵浦均匀度 光束质量 自激振荡 |
| 收稿时间： | 2019-07-26 |
| 修稿时间： | 2019-11-13 |
Improvement of beam quality by pump homogenization of Innoslab laser amplifier |
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| He Tao, Chen Xiaoming, Lu Yanhua, et al. Improvement of beam quality by pump homogenization of Innoslab laser amplifier[J]. High Power Laser and Particle Beams, 2020, 32: 011019. doi: 10.11884/HPLPB202032.190277 | |
| Authors: | He Tao Chen Xiaoming Lu Yanhua Zhang Bin Xu Liu Ye Xianlin Xu Xiafei |
| Affiliation: | 1. College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China;;2. Institute of Applied Electronics, CAEP, Mianyang 621900, China;;3. Key Laboratory of Science and Technology on High Energy Laser, China Academy of Engineering Physics, Mianyang 621900, China |
| Abstract: | The effect of pump homogenization on the beam quality of the output laser is studied for a compact partially end-pumped hybrid-cavity slab laser amplifier,i.e.Innoslab laser amplifier.Using ZEMAX simulation software,two pump coupling modes,direct imaging and homogenization with waveguide were designed,and their effects on the uniformity of light intensity distribution in the slow axis(crystal width)direction of laser diode arrays were compared.It is found that the pump uniformity is significantly improved after the waveguide is homogenized and the influence of the laser diode array luminescence dead pixels on the pump imaging is weakened.Furthermore,the effect of pumping homogenization on the performance of Innoslab laser amplifier is verified by experiments:the uniformity of slow-axis pumping increases from 90.6% to 95.4% after homogenization with waveguide,and the quality of output laser beam M2 increases from 2.41 to 1.55 after three-pass amplification,and the self-oscillation in the cavity is effectively suppressed. |
| Keywords: | Innoslab laser amplifier homogenization with waveguide pump uniformity beam quality self-oscillation |
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