Emission enhancement of femtosecond laser-induced breakdown spectroscopy using vortex beam

Wang, Qiuyun; Dang, Weijie; Jiang, Yuanfei; Chen, Anmin; Mu, Jin

doi:10.1088/1361-6455/ac6640

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…Femtosecond Vortex beam are utilized in practical applications. Wang et al investigated the emission characteristics of femtosecond Gaussian, and the spectral signal achieved by Vortex beam is twice higher than that by Gaussian beam [17]. Gertus et al studied the surface ablation using a femtosecond Vortex beam, showing the Vortex beam ablated a ring-shape morphology [18].…”

Section: Introductionmentioning

confidence: 99%

Utilizing Vortex pulse and suitable focus distance to improve the stability of laser-induced breakdown spectral (LIBS)

Gao,

Chen,

Yang

et al. 2024

Preprint

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In order to study the signal stability of reheated double pulse laser-induced breakdown spectroscopy (LIBS). Utilizing single Gaussian and Vortex pulse, the distance between the lens and sample is changed to exam the focus position effect by measuring the plasma emission spectrum. The maximum signal intensity is achieved when the focal point is behind the target. In the double Gaussian and Vortex-Gaussian LIBS schemes, the variation of spectral intensity with the inter-pulse delay time are also investigated. The change of spectral intensity with the inter-pulse delay time has a great correlation with the energy of Vortex pulse and presents a completely different trend with a low, medium and high laser pulse energy. The spectral intensity of plasma emission is closely related to the plasma temperature. Meanwhile, the Vortex-Gaussian scheme can significantly improve the spectral stability at low laser energy flux. These results show that the combination of Vortex beam and Gaussian beam can greatly enhance the spectral intensity and detection stability, presenting a strong application prospect in nondestructive detection.

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Section: Introductionmentioning

confidence: 99%

Utilizing Vortex pulse and suitable focus distance to improve the stability of laser-induced breakdown spectral (LIBS)

Gao,

Chen,

Yang

et al. 2024

Preprint

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“…Femtosecond LIBS may result in lower continuous emission, faster continuous emission decay, narrower emission lines, and the accumulation of many pulse signals as compared to nanosecond LIBS [16]. The femtosecond laser ablation mechanism differs from the nanosecond pulse mechanism [17,18]. Femtosecond LIBS can ignore heat diffusion from irradiation area to comparable surrounding area, and there is essentially no laser-plasma interaction.…”

Section: Introductionmentioning

confidence: 99%

Effect of laser pulse energy on atomic lines and molecular bands in femtosecond LIBS of aluminum

Zhang¹,

Wang²,

Chen³

et al. 2023

Laser Phys.

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This study explored the characteristics of atomic and molecular emissions in Al plasmas generated by femtosecond lasers. The influence of laser pulse energy on Al atoms and AlO molecules time-integrated spectra was examined. As laser pulse energy increased, the intensity of Al atoms increased, while the emission of AlO molecules first increased and then remained unchanged. Secondly, the vibration temperature of AlO was determined and found to result in strong emission at a low temperature. Finally, the influence of laser pulse energy on the time-resolved spectra of Al atom and AlO molecule was explored, finding consistency with the time-integrated emission. These results indicate that the Al atom and AlO molecule have different sensitivities to femtosecond laser pulse energy. This research enriches our knowledge of femtosecond laser-plasma interactions and has potential applications in material processing and spectroscopic analysis.

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“…Laser-induced breakdown spectroscopy (LIBS) is a technique that uses a high-power laser to vaporize a small amount of a sample and create plasma [1][2][3]. The light emitted by the plasma is detected by a spectrometer to obtain the element of the sample [4][5][6]. LIBS has many applications in fields such as material science, environmental monitoring, and forensic analysis.…”

Section: Introductionmentioning

confidence: 99%

Emission Enhancement in fs + ns Dual-Pulse LIBS of Cu

2023

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Femtosecond (fs) and nanosecond (ns) laser pulses have their own advantages and disadvantages in laser-induced breakdown spectroscopy (LIBS). This paper investigated fs + ns (FN) dual-pulse (DP) LIBS, utilizing the respective advantages of two laser pulses in LIBS. Compared to traditional single ns LIBS, applying a smaller energy fs pulse could effectively improve the LIBS emission. Firstly, this study discussed the spectra of FN DP LIBS with overlapping pulse time—that is, the FN DP inter-pulse delay (DID) was 0 μs. The results showed that the spectra were increased to three times that of a single ns LIBS. Subsequently, the DID between the two pulses was optimized. The results showed that as the DID between the two pulses increased, the spectral emission first increased and then decreased, ultimately remaining unchanged. The optimized DID was approximately 2 μs. Finally, using this optimized DID, the variation of spectral intensity with ns laser energy was discussed in DP LIBS. The spectral enhancement ratio increased from 3 with 0 μs DID to 6 with 2 μs DID. The investigation provides a reference in the application of FN DP LIBS element analysis.

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Emission enhancement of femtosecond laser-induced breakdown spectroscopy using vortex beam

Cited by 8 publications

References 40 publications

Utilizing Vortex pulse and suitable focus distance to improve the stability of laser-induced breakdown spectral (LIBS)

Utilizing Vortex pulse and suitable focus distance to improve the stability of laser-induced breakdown spectral (LIBS)

Effect of laser pulse energy on atomic lines and molecular bands in femtosecond LIBS of aluminum

Emission Enhancement in fs + ns Dual-Pulse LIBS of Cu

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