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Irradiation effects of CO2 laser parameters on surface morphology of fused silica |
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| Authors: | Xiang Xia Zheng Wan-Guo Yuan Xiao-Dong Dai Wei Jiang Yong Li Xi-Bin Wang Hai-Jun Lü Hai-Bing Zu Xiao-Tao |
| Institution: | Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China |
| Abstract: | To understand the surface morphology evolution of fused silica induced by 10.6-μm CO2 laser irradiation at different parameters, this paper reports that optical microscopy, profilometry, and hydrophilicity tests are utilized to characterize the surface structure and roughness of the laser irradiated area. The results show that three typical surface morphologies and two typical hydrophilicity test images are observed at different laser powers and pulse durations. The correlations between surface temperature and surface morphology as well as hydrophilicity behaviours are presented. The different hydrophilicity behaviours are related to surface structures of the laser-induced crater and thermal diffusion area. The thermal diffusion length monotonously increases with increasing laser power and pulse duration. The crater width is almost determined by the laser beam size. The crater depth is more sensitive to the laser power and pulse duration than the crater width. |
| Keywords: | CO2 laser irradiation fused silica surface structure hydrophilicity |
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