Development of miniaturized SAF-LIBS with high repetition rate acousto-optic gating for quantitative analysis  

作　　者：陈斐 侯佳佳 王刚 赵洋 李佳轩 王树青 张雷 张婉飞 马晓飞 刘珍荣 罗学彬 尹王保 贾锁堂 Fei CHEN;Jiajia HOU;Gang WANG;Yang ZHAO;Jiaxuan LI;Shuqing WANG;Lei ZHANG;Wanfei ZHANG;Xiaofei MA;Zhenrong LIU;Xuebin LUO;Wangbao YIN;Suotang JIA(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,People's Republic of China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,People's Republic of China;School of Physics and Optoelectronic Engineering,Xidian University,Xi'an 710071,People's Republic of China;Shanxi Xinhua Chemical Defense Equipment Research Institute Co.,Ltd.,Taiyuan 030006,People's Republic of China;School of Science,North University of China,Taiyuan 030051,People's Republic of China;National Energy R&D Center of Petroleum Refining Technology(RIPP,SINOPEC),Beijing 100083,People's Republic of China)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,People's Republic of China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,People's Republic of China [3]School of Physics and Optoelectronic Engineering,Xidian University,Xi'an 710071,People's Republic of China [4]Shanxi Xinhua Chemical Defense Equipment Research Institute Co.,Ltd.,Taiyuan 030006,People's Republic of China [5]School of Science,North University of China,Taiyuan 030051,People's Republic of China [6]National Energy R&D Center of Petroleum Refining Technology(RIPP,SINOPEC),Beijing 100083,People's Republic of China

出　　处：《Plasma Science and Technology》2023年第1期157-164,共8页等离子体科学和技术（英文版）

基　　金：National Key R&D Program of China(No.2017YFA0304203);National Energy R&D Center of Petroleum Refining Technology(RIPP,SINOPEC),Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(IRT_17R70);National Natural Science Foundation of China(Nos.61975103,61875108,61775125 and 11434007);Major Special Science and Technology Projects in Shanxi(No.201804D131036);111 Project(No.D18001);Fund for Shanxi’1331KSC’。

摘　　要：The self-absorption effect in laser-induced breakdown spectroscopy(LIBS)reduces the accuracy of quantitative measurement results.The self-absorption-free LIBS(SAF-LIBS)has been proved to directly capture the optically thin plasma spectra by setting an appropriate exposure time.In this work,a novel SAF-LIBS technique with high repetition rate acousto-optic gating is developed,in which an acousto-optic modulator is used as the shutter to diffract the optically thin fluorescence,and a high repetition rate laser is used to produce quasi-continuous plasmas to enhance the integral spectral intensity,so that the CCD spectrometer can replace an intensified CCD(ICCD)and echelle spectrometer in SAF-LIBS.Experimental results show that the average absolute prediction error of aluminum is reduced to 0.18%,which is equivalent to that of traditional SAF-LIBS.This technique not only effectively shields continuous background radiation and broadened spectral lines in optically thick plasma,but also has advantages of miniaturization,low cost,convenience and reliability.

关 键 词：self-absorption-free LIBS(SAF-LIBS) self-absorption effect optically thin plasma high repetition rate laser acousto-optic gating 

分 类 号：TN2[电子电信—物理电子学]