激光脉冲宽度对激光诱导击穿光谱强度和烧蚀形貌的影响

祁言兵; 孙衡; 粟文卓; 周卫东

doi:10.11884/HPLPB202638.250177

激光脉冲宽度对激光诱导击穿光谱强度和烧蚀形貌的影响

doi: 10.11884/HPLPB202638.250177

祁言兵^{1, 2,},
孙衡^{1, 2},
粟文卓^{1, 2},
周卫东^{1, 2, ,}

1.
浙江省光信息检测与显示技术研究重点实验室，浙江师范大学，浙江金华 321004
2.
浙江光电子研究院，浙江金华 321004

基金项目: 国家自然科学基金项目(61975186)

详细信息

作者简介:
祁言兵，sunheng0320@163.com

通讯作者:
周卫东，wdzhou@zjnu.cn。

中图分类号: O433.5
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- 文章访问数: 32
- HTML全文浏览量: 17
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2025-06-19
- 修回日期: 2025-12-20
- 录用日期: 2025-11-25
- 网络出版日期: 2026-01-05

Effects of laser pulse duration on the intensity of laser-induced breakdown spectroscopy and ablation morphology

Qi Yanbing^{1, 2
,},
Sun Hen^{1, 2},
Li Wenzhuo^{1, 2},
Zhou Weidong^{1, 2
, ,}

1.
Key Laboratory of Optical Information Detection and Display Technology of Zhejiang, Zhejiang Normal University, Zhejiang, Jinhua 321004, China
2.
Zhejiang Institute of Photoelectronics, Zhejiang, Jinhua 321004, China

摘要

摘要: 对比研究了在纳秒脉冲激光激发的传统共线双脉冲（dual pulse, DP）激发模式及微秒加纳秒脉冲激光激发的长短共线双脉冲激发模式下，双脉冲间延时、光谱采集延时和激光能量对激光诱导击穿光谱(Laser induced breakdown spectroscopy, LIBS)增强及其变化规律的影响，探讨分析了这两种不同双脉冲激光激发模式下样品表面烧蚀形貌的差异及成因。研究结果表明传统共线DP-LIBS谱线强度在0～2 μs短延时内迅速增加，并在2～14 μs较长延时范围内谱线强度都比较高，其最佳脉冲间延时约为4 μs。而长短共线DP-LIBS光谱的最佳脉冲间延时约为25 μs，取决于长脉冲激光峰值功率位置。在传统共线DP-LIBS中，相较于第一束激光，改变第二束激光的能量时，LIBS光谱增强变化更为显著。而长短共线DP-LIBS中，随着长脉冲激光能量增加，有利于样品加热和表面改性，光谱强度增强，但长脉冲能量过高会导致样品熔融和材料飞溅，反而会削弱第二束短脉冲激光的烧蚀效果并降低光谱强度。进一步对烧蚀形貌分析发现，传统共线DP-LIBS形成烧蚀坑的较深，而长短共线DP-LIBS则易于产生更大烧蚀斑。
- 激光诱导击穿光谱 /
- 双脉冲 /
- 脉冲宽度
Abstract: Background
The dual-pulse LIBS (DP-LIBS) technology can effectively enhance the spectral intensity of LIBS and has received widespread attention in LIBS analysis.
Purpose
For the purpose to understand the enhancement mechanism of traditional collinear dual pulse LIBS and long-short collinear dual pulse LIBS spectra, a comparative study was conducted on two DP-LIBS with different laser excitation schemes, i.e. the conventional collinear dual nanosecond pulse excitation scheme, and the long-short collinear dual-pulse excitation scheme which combining a microsecond pulse and a nanosecond pulse.
Method
The enhancement mechanism and variation trend of spectral intensity were investigated by systematically analyzing the laser ablation morphology and LIBS spectra collected under different inter-pulse delay, spectral acquisition delay and laser pulse energy in both DP-LIBS modes.
Results
The results show that, in conventional collinear DP-LIBS, the spectral intensity increases rapidly within a short delay time of 0–2 μs, but remains relatively high in the longer delay range of 2–14 μs. And the optimal inter-pulse delay is around 4 μs in conventional collinear DP-LIBS. In contrast, the optimal inter-pulse delay for the long-short collinear DP-LIBS is approximately 25 μs, which is determined by the peak power timing of the long-pulse laser.
Conclusions
In the conventional DP-LIBS configuration, spectral enhancement is more sensitive to the energy variations of the second pulse than that of the first pulse. In the long-short pulse scheme, increasing the energy of the long-pulse laser facilitates sample heating and surface modification, thereby enhancing spectral intensity. However, excessive long-pulse laser energy might cause sample melting and material ejection, which in turn diminishes the ablation efficiency of the subsequent short-pulse laser and reduces the overall spectral intensity. Further analysis of the ablation morphology reveals that the conventional collinear DP-LIBS tends to produce deeper ablation craters, whereas the long-short collinear DP-LIBS is more likely to generate larger ablation craters.
- laser-induced breakdown spectroscopy /
- double pulse /
- pulse width

HTML全文

图 1 共线DP-LIBS装置结构示意图

Figure 1. Schematic diagram of the collinear DP-LIBS setup

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图 2 传统DP-LIBS和长短DP-LIBS模式下光谱强度，信噪比和稳定性随采集延时的变化

Figure 2. Variation of spectral intensity, signal-to-noise ratio, and stability with acquisition delay for conventional DP-LIBS and long-short DP-LIBS

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图 3 传统DP-LIBS光谱强度随脉冲间延时的变化

Figure 3. Variation of spectral intensity with interpulse delay in conventional DP-LIBS

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图 4 长短DP-LIBS光谱强度随脉冲间延时的变化

Figure 4. Spectral intensity variation with interpulse delay in long-short DP-LIBS mode

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图 5 传统DP-LIBS光谱图和谱线强度与激光能量的关系

Figure 5. The variation of spectra and line intensities with varying laser energies in conventional DP-LIBS

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图 6 短脉冲L2激光能量为30 mJ时长短DP-LIBS谱线强度随长脉冲L1激光能量的变化关系

Figure 6. The variation of spectral line intensity with L1 laser energy in long-short DP-LIBS at a fixed L2 energy of 30 mJ

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图 7 长短共线DP-LIBS 和单脉冲LIBS中谱线强度随激光能量的变化关系

Figure 7. Spectral Line intensity with laser energy in long-short DP-LIBS and in single-pulse LIBS

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图 8 传统共线双脉冲和长短共线双脉冲模式下的激光烧蚀表面形貌图

Figure 8. Surface morphology image of the laser-ablated area in conventional DP-LIBS mode and long-short DP-LIBS mode

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参考文献(20)

[1]	Hahn D W, Omenetto N. Laser-induced breakdown spectroscopy (LIBS), part II: review of instrumental and methodological approaches to material analysis and applications to different fields[J]. Applied Spectroscopy, 2012, 66(4): 347-419. doi: 10.1366/11-06574
[2]	Laserna J, Vadillo J M, Purohit P. Laser-induced breakdown spectroscopy (LIBS): fast, effective, and agile leading edge analytical technology[J]. Applied Spectroscopy, 2018, 72(s1): 35-50. doi: 10.1177/0003702818791926
[3]	Koch S, Court R, Garen W, et al. Detection of manganese in solution in cavitation bubbles using laser induced breakdown spectroscopy[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2005, 60(7/8): 1230-1235. doi: 10.1016/j.sab.2005.06.015
[4]	王建伟, 张娜珍, 侯可勇, 等. LIBS技术在土壤重金属污染快速测量中的应用[J]. 化学进展, 2008, 20(7/8): 1165-1171 Wang Jianwei, Zhang Nazhen, Hou Keyong, et al. Application of LIBS technology to the rapid measure of heavy metal contamination in soils[J]. Progress in Chemistry, 2008, 20(7/8): 1165-1171
[5]	Moncayo S, Rosales J D, Izquierdo-Hornillos R, et al. Classification of red wine based on its protected designation of origin (PDO) using Laser-induced Breakdown Spectroscopy (LIBS)[J]. Talanta, 2016, 158: 185-191. doi: 10.1016/j.talanta.2016.05.059
[6]	Kongbonga Y G M, Ghalila H, Onana M B, et al. Classification of vegetable oils based on their concentration of saturated fatty acids using laser induced breakdown spectroscopy (LIBS)[J]. Food Chemistry, 2014, 147: 327-331. doi: 10.1016/j.foodchem.2013.09.145
[7]	Dong Meirong, Wei Liping, Lu Jidong, et al. A comparative model combining carbon atomic and molecular emissions based on partial least squares and support vector regression correction for carbon analysis in coal using LIBS[J]. Journal of Analytical Atomic Spectrometry, 2019, 34(3): 480-488. doi: 10.1039/C8JA00414E
[8]	Yip W L, Cheung N H. Analysis of aluminum alloys by resonance-enhanced laser-induced breakdown spectroscopy: how the beam profile of the ablation laser and the energy of the dye laser affect analytical performance[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2009, 64(4): 315-322. doi: 10.1016/j.sab.2009.03.020
[9]	Vinić M, Ivković M. Spatial and temporal characteristics of laser ablation combined with fast pulse discharge[J]. IEEE Transactions on Plasma Science, 2014, 42(10): 2598-2599. doi: 10.1109/TPS.2014.2330372
[10]	李霞芬, 周卫东, 钱惠国, 等. 激光烧蚀脉冲放电激发的土壤等离子体电子数密度和温度的研究[J]. 光学学报, 2011, 31: 1130001 doi: 10.3788/AOS201131.1130001 Li Xiafen, Zhou Weidong, Qian Huiguo, et al. Electron temperature and density of soil plasma generated by laser ablation fast pulse discharge spectroscopy[J]. Acta Optica Sinica, 2011, 31: 1130001 doi: 10.3788/AOS201131.1130001
[11]	Viljanen J, Sun Zhiwei, Alwahabi Z T. Microwave assisted laser-induced breakdown spectroscopy at ambient conditions[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2016, 118: 29-36. doi: 10.1016/j.sab.2016.02.002
[12]	王金梅, 杨志, 郑培超, 等. 空间约束LIBS结合树脂富集对土壤Cu元素的分析[J]. 中国激光, 2025, 52: 0611001 doi: 10.3788/CJL241179 Wang Jinmei, Yang Zhi, Zheng Peichao, et al. Analysis of Cu elements in soil by spatially constrained LIBS combined with resin enrichment[J]. Chinese Journal of Lasers, 2025, 52: 0611001 doi: 10.3788/CJL241179
[13]	Popov A M, Colao F, Fantoni R. Enhancement of LIBS signal by spatially confining the laser-induced plasma[J]. Journal of Analytical Atomic Spectrometry, 2009, 24(5): 602-604. doi: 10.1039/b818849a
[14]	王金梅, 郑慧娟, 郑培超, 等. 正交再加热双脉冲激光诱导黄连等离子体的光谱特性[J]. 中国激光, 2018, 45: 0702006 doi: 10.3788/CJL201845.0702006 Wang Jinmei, Zheng Huijuan, Zheng Peichao, et al. Spectral characteristics of coptis chinensis plasma induced by orthogonal re-heating double-pulse laser[J]. Chinese Journal of Lasers, 2018, 45: 0702006 doi: 10.3788/CJL201845.0702006
[15]	杨瑞兆, 苏雪娇, 於有利, 等. 共线双脉冲激光诱导击穿光谱技术检测铝合金中的Cr和Mn[J]. 强激光与粒子束, 2018, 30: 099001 doi: 10.11884/HPLPB201830.180053 Yang Ruizhao, Su Xuejiao, Yu Youli, et al. Double pulse laser-induced breakdown spectroscopy analysis of trace elements Cr and Mn in aluminum alloy[J]. High Power Laser and Particle Beams, 2018, 30: 099001 doi: 10.11884/HPLPB201830.180053
[16]	杜闯, 高勋, 邵妍, 等. 土壤中重金属元素的双脉冲激光诱导击穿光谱研究[J]. 物理学报, 2013, 62: 045202 doi: 10.3969/j.issn.1007-9432.2014.05.023 Du Chuang, Gao Xun, Shao Yan, et al. Analyses of heavy metals by soil using dual-pulsed laser induced breakdown spectroscopy[J]. Acta Physica Sinica, 2013, 62: 045202 doi: 10.3969/j.issn.1007-9432.2014.05.023
[17]	高勋, 邵妍, 杜闯, 等. 预烧蚀激光参数对双脉冲激光诱导击穿光谱增强的影响[J]. 中国激光, 2013, 40: 0815003 doi: 10.3788/CJL201340.0815003 Gao Xun, Shao Yan, Du Chuang, et al. Pre-ablation laser parameters effect on the spectral enhancement of double pulsed laser induced breakdown spectroscopy[J]. Chinese Journal of Lasers, 2013, 40: 0815003 doi: 10.3788/CJL201340.0815003
[18]	Bhatt C R, Hartzler D, Jain J C, et al. Evaluation of analytical performance of double pulse laser-induced breakdown spectroscopy for the detection of rare earth elements[J]. Optics & Laser Technology, 2020, 126: 106110. doi: 10.1016/j.optlastec.2020.106110
[19]	Cui Minchao, Guo Haorong, Chi Yada, et al. Quantitative analysis of trace carbon in steel samples using collinear long-short double-pulse laser-induced breakdown spectroscopy[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2022, 191: 106398. doi: 10.1016/j.sab.2022.106398
[20]	Wang Zhenzhen, Deguchi Y, Liu Renwei, et al. Emission characteristics of laser-induced plasma using collinear long and short dual-pulse laser-induced breakdown spectroscopy (LIBS)[J]. Applied Spectroscopy, 2017, 71(9): 2187-2198. doi: 10.1177/0003702817693239