4程放大光路自动准直系统研究
Study of beams automatic alignment in four-pass amplifiers
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摘要: 激光束光路自动准直系统用于神光Ⅲ原型装置光束精密准直。针对神光-Ⅲ原型的总体要求和主光路，结合光路自动准直的关键技术，充分考虑了其4程放大主空间滤波器的4个小孔空间分布和光学位置的特点，利用小孔像传递的原理，设计出一套优化、合理的4程放大的光路准直总体方案，并且在多程放大实验平台上得到了充分的验证和考核。Abstract: Laser beam automatic alignment systems are used to align the SG-Ⅲ prototype facility laser. Considering the facility qequirement, combining the key technique of automatic alignment, according to the image relay of the pinhole, utilizing the optical position and the spatial location of the four pinholes of the main spatial filter in the four-pass beam in the SG-Ⅲ, this paper presents a reasonable scheme for automatic aligning in the four-pass amplifier, which has been fully checked on the multi-pass amplifier experiment system．The centering sensitivities of the system are less than 0.5% of the beam diameter. The pointing sensitivities of the system are less than 10μm.
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Key words:
- aser technique /
- beams alignment /
- four-pass amplifier /
- image relaying
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