https://doi.org/10.1051/epjap/2020200258
Regular Article
Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, P.R. China
* e-mail: qiang.gao@tju.edu.cn
Received:
7
August
2020
Received in final form:
9
October
2020
Accepted:
15
October
2020
Published online: 20 November 2020
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.
© EDP Sciences, 2020
