| 激光能量及重复频率对土壤等离子体特性的影响 |
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| 引用本文： | 鲁翠萍,刘文清,赵南京,刘立拓,陈东,张玉钧,刘建国.激光能量及重复频率对土壤等离子体特性的影响[J].中国激光,2011(2). |
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| 作者姓名： | 鲁翠萍 刘文清 赵南京 刘立拓 陈东 张玉钧 刘建国 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室安徽省环境光学监测技术重点实验室; |
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| 基金项目： | 国家自然科学基金(60908018); 中国科学院知识创新工程重大项目(kzcx1-yw-06-01); 安徽省科技计划项目(083H3b1581); 所长基金(073H371141)资助课题 |
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| 摘 要： | 利用波长为1064 nm的Nd∶YAG脉冲激光器作光源,以高分辨率、宽光谱段的中阶梯光栅光谱仪和增强型电荷耦合器件(ICCD)作为谱线分离与探测器件,测量并分析了激光能量及重复频率对土壤中铅元素激光诱导击穿光谱特性的影响。实验结果表明,随着激光脉冲能量(在25~105 mJ范围内)增加,谱线强度呈线性增加,随后谱线强度随脉冲能量(105~165 mJ)的变化呈非线性关系。信背比随激光能量的增加而增大,但激光能量超过60 mJ后基本上不变。激光重复频率为1 Hz时,谱线强度最大,而谱线强度的相对标准偏差则在重复频率为7 Hz时最小。
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| 关 键 词： | 光谱学 激光诱导击穿光谱 激光能量 重复频率 |
Influence of Laser Energy and Repetition Rate on Characteristic of Laser-Induced Soil Plasmas |
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| Lu Cuiping Liu Wenqing Zhao Nanjing Liu Lituo Chen Dong Zhang Yujun Liu Jianguo.Influence of Laser Energy and Repetition Rate on Characteristic of Laser-Induced Soil Plasmas[J].Chinese Journal of Lasers,2011(2). |
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| Authors: | Lu Cuiping Liu Wenqing Zhao Nanjing Liu Lituo Chen Dong Zhang Yujun Liu Jianguo |
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| Affiliation: | Lu Cuiping Liu Wenqing Zhao Nanjing Liu Lituo Chen Dong Zhang Yujun Liu Jianguo(Key Laboratory of Environment Optics and Technology,Chinese Academy of Sciences,Anhui Province Laboratory of Environment Optics Monitoring Technology,Anhui Institute of Optics and Fine Mechanics,Hefei,Anhui 230031,China) |
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| Abstract: | The influence of the pulse energy and the pulse repetition frequency are measured.The Nd:YAG pulse laser which wavelength is 1064 nm is used as the excitation source.The characteristics of laser-induced breakdown spectroscopy(LIBS) of metal element Pb in soil are analyzed.The high resolved and the wide spectral echelle spectrograph and intensity charged coupled device(ICCD) are used as the spectral line separation and detector.The experimental results showed that the spectral line intensity increases linear... |
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| Keywords: | spectroscopy laser-induced breakdown spectroscopy laser energy repetition rate |
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