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摘要: 随着激光二极管技术的发展，以及一些先进热管理方案和新型加工工艺的涌现，固体激光器的输出功率已达到百千瓦量级，而光束质量的控制问题却日益凸显。本文归纳了板条激光器的光束质量控制技术，对当前已经实现了的几种技术路线进行了深入细致的分析，包括静态相位校正技术、非线性光学校正技术、自适应光学校正技术、几何光学校正技术等，并分别介绍了其工作原理、研究进展以及优缺点。Abstract: With the rapid development of laser diodes and the emergence of advanced thermal management technology and new processing techniques, the average power of solid-state lasers has already achieved levels of 100 kW in recent years, while problems with beam quality control become increasingly prominent. This paper summarizes the beam quality control technology of slab lasers. Several technical approaches are analyzed in detail, including the static phase corrector, nonlinear optics correction technology, adaptive optics correction technology, geometrical optics correction technology, etc. Their principle, current research progress, advantages and disadvantages are introduced respectively.
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Key words:
- slab lasers /
- thermal effects /
- wavefront aberrations /
- aberration correction /
- beam quality
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图 2 像差补偿前(a)和像差补偿后(b)的远场光斑图
Figure 2. Profiles at the Fourier plane without(a) and with(b) phase correction
图 5 互易式自校正谐振腔原理示意图
Figure 5. Schematic diagram of reciprocal self-correcting resonator
图 8 诺·格公司百千瓦相干合成实验原理图
Figure 8. Schematic of the 100kW coherently combined laser system
图 10 腔内像差补偿系统原理图
Figure 10. Principle diagram of intracavity aberration compensation system
图 11 离轴三反像差校正系统实验原理图
Figure 11. Principle diagram of offaxis tri-inversion aberration correction sytsem
图 12 MOPA激光器混合式像差校正系统示意图
Figure 12. Schematic of the hybrid AO syetem for the MOPA laser
表 1 AO系统进行像差校正的代表性成果
Table 1. Representative results of aberration correction used by AO system
年份 单位 功率 光束质量 2007 诺·格公司 15 kW(平均) 1.28×DL 2009 诺·格公司 100 kW(平均) 2.9×DL 2012 中科院光电所 265 W(平均) 6.2×DL(β) 2013 国防科技大学 11.3 kW(平均) 4.06×DL(β) 2015 中科院理化所 8.2 kW(平均) 3.5×DL(β) 2018 中科院光电所 750 MW(峰值) 1.64×DL(β) 
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