Utilization of moderate cylindrical confinement for precision improvement of laser-induced breakdown spectroscopy signal

被引：93
作者：
Wang, Zhe [1 ]
Hou, Zongyu [1 ]
Lui, Siu-lung [1 ]
Jiang, Dong [1 ]
Liu, Jianmin [2 ]
Li, Zheng [1 ]
机构：
[1] Tsinghua Univ, State Key Lab Power Syst, Dept Thermal Engn, Tsinghua BP Clean Energy Ctr, Beijing 100084, Peoples R China
[2] China Guodian Sci & Technol Res Inst, Nanjing 100034, Jiangsu, Peoples R China
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 23期
基金：
中国国家自然科学基金;
关键词：
OPTICAL-EMISSION; INDUCED PLASMAS; ABLATION; LIBS; ENHANCEMENT; PRESSURE;
D O I：
10.1364/OE.20.0A1011
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Moderate cylindrical cavity was used to regularize the laser-induced plasma for signal strength enhancement and precision improvement in laser-induced breakdown spectroscopy (LIBS). A polytetrafluoroethylene (PTFE) plate of 1.5 mm thickness with diameter of 3 mm was fabricated. It was placed closely on a sample surface and a laser pulse was shot through the center of the hole to the sample. Using coal as samples, it was verified that the configuration both enhanced the spectral line intensity and reduced shot-to-shot fluctuation, showing its great potential in improving the precision of LIBS analysis. (c) 2012 Optical Society of America
引用
收藏
页码：A1011 / A1018
页数：8
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