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
300.6365 Spectroscopy, laser induced breakdown 140.3330 Laser damage 140.3440 Laser-induced breakdown
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.