XU Shi-Zhen1,2, LV Hai-Bing2, YUAN Xiao-Dong2, HUANG Jin2, JIANG Xiao-Dong2, WANG Hai-Jun2, ZU Xiao-Tao1, ZHENG Wan-Guo2
1Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 6100542Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900
1Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 6100542Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900
摘要Damage points induced by 355nm laser irradiation increase more quickly on the surface of fused silica in vacuum of about 10-3Pa than in atmospheric air at the same fluence. The larger concentration of point defects in vacuum is confirmed by photoluminescence intensity. X-ray photoelectron spectroscopy and infrared absorption indicate the formation of sub-stoichiometric silica on the surface. The degradation mechanism of fused silica in vacuum is discussed.
Abstract：Damage points induced by 355nm laser irradiation increase more quickly on the surface of fused silica in vacuum of about 10-3Pa than in atmospheric air at the same fluence. The larger concentration of point defects in vacuum is confirmed by photoluminescence intensity. X-ray photoelectron spectroscopy and infrared absorption indicate the formation of sub-stoichiometric silica on the surface. The degradation mechanism of fused silica in vacuum is discussed.
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2008, Vol. 25 
