Generation of high-temperature and low-density plasma with strong spectral intensity by changing the distance between the focusing lens and target surface in femtosecond laser-induced breakdown spectroscopy

2019 ◽  
Vol 34 (5) ◽  
pp. 1018-1025 ◽  
Author(s):  
Wanpeng Xu ◽  
Anmin Chen ◽  
Qiuyun Wang ◽  
Dan Zhang ◽  
Ying Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Femtosecond Laser ◽  
Target Surface ◽  
Laser Induced Breakdown Spectroscopy ◽  
Low Density ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Focusing Lens ◽  
Low Density Plasma ◽  
Density Plasma

This paper exhibits the generation of high-temperature and low-density plasma with strong spectral intensity by changing the distance between focusing lens and target surface in femtosecond laser-induced breakdown spectroscopy.

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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