14 July 2015 Relationship between large-aperture optical components of striated surface shape and focal spot characteristics in the far-field
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Abstract
Surface shape of optical components is an essential factor of the laser beam quality. Different types of surface correspond to different characteristics of the laser focal spot. Striated surface shape is one of common and typical cases of optical component surfaces in laser facilities, which have attracted great attention. For learning the impact of the component on focal spot in the far-field, a model component with the similar features was introduced in the study. Intensity distributions of focal spot in the far-field was simulated after laser beam went through the model component. Effects of the modulation depth and the modulation period on spot morphology were presented. Furthermore, the relations between these optical specifications and focal spots with some requirements had been analyzed. The results can enhance our understanding about striae degrees of optical elements and have reference values to guide the processing and the use of large-aperture components correctly.
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Zemin Lei, Zemin Lei, Xiaoyan Sun, Xiaoyan Sun, Xianhua Yin, Xianhua Yin, Fengnian Lv, Fengnian Lv, Zhen Zhang, Zhen Zhang, Xingqiang Lu, Xingqiang Lu, Dianyuan Fan, Dianyuan Fan, } "Relationship between large-aperture optical components of striated surface shape and focal spot characteristics in the far-field", Proc. SPIE 9532, Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers, 95321M (14 July 2015); doi: 10.1117/12.2185524; https://doi.org/10.1117/12.2185524
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