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Influence of key parameters on signal quality in double-pulse laser-induced breakdown spectroscopy (DP-LIBS).

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Title: Influence of key parameters on signal quality in double-pulse laser-induced breakdown spectroscopy (DP-LIBS).
Authors: Rizwan, Muhammad1 (AUTHOR), Afgan, Muhammad Sher1 (AUTHOR), Saleem, Seher1 (AUTHOR), Hou, Zongyu1,2 (AUTHOR), Wang, Zhe1,2,3,4 (AUTHOR) zhewang@tsinghua.edu.cn
Source: JAAS (Journal of Analytical Atomic Spectrometry). Jul2026, Vol. 41 Issue 7, p2394-2403. 10p.
Subjects: Laser-induced breakdown spectroscopy, Laser ablation, Laser plasmas, Statistical reliability, Spectral energy distribution
Abstract: The instability of spectral signals is a major challenge in double-pulse laser-induced breakdown spectroscopy (DP-LIBS), and a primary factor of instability is the inhomogeneity of the laser-induced plasma. First, we studied the influence of the energy combination of the two laser pulses on signal intensity, repeatability and the interpulse delay and then systematically investigated the impact of a key parameter, the interpulse delay, on spectral intensity and repeatability using spectral, image, and crater analyses of a brass sample. Maximum enhancement was achieved when the second pulse interacted with the plasma at an interpulse delay that allowed optimal laser absorption and increased material ablation. The emission intensity increased and the relative standard deviation (RSD) reduced with increasing interpulse delay up to 3 µs; at this delay, the minimum RSD of ∼3.86% with an intensity enhancement factor (IEF) of ∼8.70 relative to that at 0 µs was achieved for the Cu I 515.32 nm line. The emission intensity and RSD values were improved by ∼3.24 times and ∼24.30 times, respectively, relative to those obtained by single-pulse LIBS. The crater volume and ablation depth were approximately double that of single-pulse LIBS, while the image analysis showed a rebound and crash process of the plasma generated by the second pulse under the conditions created by the first plasma. Higher plasma ablation and plasma heating yielded higher spectral intensity, while increased homogeneity in the plasma resulted in improved signal repeatability for the DP-LIBS. Thus, selection of an appropriate interpulse delay, which depends on the energy combination of both lasers, plays a key role in improving the signal intensity and repeatability. These results will expedite the use of DP-LIBS as an effective signal and repeatability enhancement technique for various applications. [ABSTRACT FROM AUTHOR]
Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 195178483
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Influence of key parameters on signal quality in double-pulse laser-induced breakdown spectroscopy (DP-LIBS).
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  Data: <searchLink fieldCode="AR" term="%22Rizwan%2C+Muhammad%22">Rizwan, Muhammad</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Afgan%2C+Muhammad+Sher%22">Afgan, Muhammad Sher</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Saleem%2C+Seher%22">Saleem, Seher</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Zongyu%22">Hou, Zongyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhe%22">Wang, Zhe</searchLink><relatesTo>1,2,3,4</relatesTo> (AUTHOR)<i> zhewang@tsinghua.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22JAAS+%28Journal+of+Analytical+Atomic+Spectrometry%29%22">JAAS (Journal of Analytical Atomic Spectrometry)</searchLink>. Jul2026, Vol. 41 Issue 7, p2394-2403. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Laser-induced+breakdown+spectroscopy%22">Laser-induced breakdown spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+ablation%22">Laser ablation</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+plasmas%22">Laser plasmas</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+reliability%22">Statistical reliability</searchLink><br /><searchLink fieldCode="DE" term="%22Spectral+energy+distribution%22">Spectral energy distribution</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The instability of spectral signals is a major challenge in double-pulse laser-induced breakdown spectroscopy (DP-LIBS), and a primary factor of instability is the inhomogeneity of the laser-induced plasma. First, we studied the influence of the energy combination of the two laser pulses on signal intensity, repeatability and the interpulse delay and then systematically investigated the impact of a key parameter, the interpulse delay, on spectral intensity and repeatability using spectral, image, and crater analyses of a brass sample. Maximum enhancement was achieved when the second pulse interacted with the plasma at an interpulse delay that allowed optimal laser absorption and increased material ablation. The emission intensity increased and the relative standard deviation (RSD) reduced with increasing interpulse delay up to 3 µs; at this delay, the minimum RSD of ∼3.86% with an intensity enhancement factor (IEF) of ∼8.70 relative to that at 0 µs was achieved for the Cu I 515.32 nm line. The emission intensity and RSD values were improved by ∼3.24 times and ∼24.30 times, respectively, relative to those obtained by single-pulse LIBS. The crater volume and ablation depth were approximately double that of single-pulse LIBS, while the image analysis showed a rebound and crash process of the plasma generated by the second pulse under the conditions created by the first plasma. Higher plasma ablation and plasma heating yielded higher spectral intensity, while increased homogeneity in the plasma resulted in improved signal repeatability for the DP-LIBS. Thus, selection of an appropriate interpulse delay, which depends on the energy combination of both lasers, plays a key role in improving the signal intensity and repeatability. These results will expedite the use of DP-LIBS as an effective signal and repeatability enhancement technique for various applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1039/d6ja00041j
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 2394
    Subjects:
      – SubjectFull: Laser-induced breakdown spectroscopy
        Type: general
      – SubjectFull: Laser ablation
        Type: general
      – SubjectFull: Laser plasmas
        Type: general
      – SubjectFull: Statistical reliability
        Type: general
      – SubjectFull: Spectral energy distribution
        Type: general
    Titles:
      – TitleFull: Influence of key parameters on signal quality in double-pulse laser-induced breakdown spectroscopy (DP-LIBS).
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          Name:
            NameFull: Rizwan, Muhammad
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            NameFull: Afgan, Muhammad Sher
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            NameFull: Saleem, Seher
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            NameFull: Hou, Zongyu
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            NameFull: Wang, Zhe
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            – D: 01
              M: 07
              Text: Jul2026
              Type: published
              Y: 2026
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              Value: 41
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              Value: 7
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            – TitleFull: JAAS (Journal of Analytical Atomic Spectrometry)
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