Chinese Optics Letters, 2019, 17 (12): 123002, Published Online: Dec. 3, 2019  

Characteristics of optical emission during laser-induced damage events of fused silica Download: 905次

Author Affiliations
1 Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
2 Key Laboratory of Optical Monitoring Technology for Environment, Hefei 230031, China
3 Carinthian Tech Research, 9524 Villach, Austria
4 Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
5 State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China
Abstract
Spontaneous optical emission properties of laser-produced plasma during laser damage events at input and exit surfaces of fused silica were retrieved and compared. We show that plasma at the input surface is much larger in size and exhibits significantly higher electron number density and excitation temperature, even when smaller laser energy was used. This effect was attributed to the stronger laser–plasma coupling at the input surface. In addition, a strong continuum background containing three peaks at 1.3 eV, 1.9 eV, and 2.2 eV was observed at the exit surface, and possible origins for this effect are also discussed.

Chao Shen, Nanjing Zhao, Jaka Pribošek, Mingjun Ma, Li Fang, Xingjiu Huang, Yujun Zhang. Characteristics of optical emission during laser-induced damage events of fused silica[J]. Chinese Optics Letters, 2019, 17(12): 123002.

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