Enhanced optical emission in laser-induced breakdown spectroscopy by combining femtosecond and nanosecond laser pulses

被引：42

作者：

Wang, Ying ^{[1
,2
]}

Chen, Anmin ^{[1
,2
]}

Zhang, Dan ^{[1
,2
]}

Wang, Qiuyun ^{[1
,2
]}

Li, Suyu ^{[1
,2
]}

Jiang, Yuanfei ^{[1
,2
]}

Jin, Mingxing ^{[1
,2
]}

机构：

[1] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China

[2] Jilin Univ, Jilin Prov Key Lab Appl Atom & Mol Spect, Changchun 130012, Peoples R China

来源：

PHYSICS OF PLASMAS | 2020年 / 27卷 / 02期

基金：

中国国家自然科学基金;

关键词：

QUANTITATIVE-ANALYSIS; ELEMENTAL ANALYSIS; INTENSITY; TEMPERATURE; DEPENDENCE; SINGLE; LIBS; ALLOY; STEEL; TEETH;

D O I：

10.1063/1.5131772

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The role of inter-pulse delay time in laser-induced Cu plasma with femtosecond and nanosecond double-pulse irradiation had been investigated by optical emission spectroscopy. The experimental results showed that a significant enhancement effect in the atomic line emission was observed by changing the inter-pulse delay time. The spectral intensity of Cu plasma produced by a femtosecond + nanosecond double-pulse was higher than that produced by a nanosecond + femtosecond dual-pulse. That is to say, the shorter laser pulse (femtosecond) was efficient in coupling to the sample and the longer laser pulse (nanosecond) was suitable for re-exciting the produced plasma. In addition, the corresponding plasma temperature and electron density were also calculated. The plasma temperature in the case of femtosecond + nanosecond was lower than that in the case of nanosecond + femtosecond, while the electron density in the case of femtosecond + nanosecond was higher than that in the case of nanosecond + femtosecond. This study is helpful for the research on sample detection using femtosecond and nanosecond double-pulse laser-induced breakdown spectroscopy.

引用

页数：7

共 61 条

[1] A comparative study of enhanced emission in double pulse laser induced breakdown spectroscopy [J].