| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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The Structure Evolution of Fused Silica Induced by CO2 Laser Irradiation |
| LIU Chun-Ming1,2,JIANG Yong1,2,LUO Cheng-Si1,2,SHI Xiao-Yan2,REN Wei1,XIANG Xia2,WANG Hai-Jun1,HE Shao-Bo1,YUAN Xiao-Dong1**,LV Hai-Bing1,ZHENG Wan-Guo1,ZU Xiao-Tao2 |
1Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900
2Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054 |
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| Cite this article: |
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LIU Chun-Ming, JIANG Yong, LUO Cheng-Si et al 2012 Chin. Phys. Lett. 29 044211 |
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Abstract The structure evolution of fused silica induced by CO2 laser irradiation (with a wavelength of 10.6 µm ) is studied in detail. In the non-evaporation mitigation process, the irradiation time should be long enough to completely eliminate damage. However, there is a raised rim around the mitigated site. The rim height is enhanced when the irradiation time increases, and the mitigated site can lead to off-axis and on-axis downstream light intensification. Volume shrinkage occurs during the irradiation and rapid cooling processes, and this may be due to a decrease in the Si–O–Si bond angle. The distribution of debris overlaps with the maximum phase retardance induced by stress. The debris arouses an enhanced light absorption in the region from 220 nm to 800 nm.
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Received: 13 November 2011
Published: 04 April 2012
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