Compact diode-pumped Nd:YAG laser for remote analysis of low-alloy steels by laser-induced breakdown spectroscopy

Lednev, V. N.; Dormidonov, A. E.; Sdvizhenskii, P. A.; Grishin, M. Ya.; Fedorov, Alexander N.; Savvin, A. D.; Safronova, E. S.; Першин, С. М.

doi:10.1039/c7ja00319f

Cited by 34 publications

(3 citation statements)

References 35 publications

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“…Then an oblate cylindrical plasma structure appears which has been claimed as the unique plasma morphology of FO-LIBS. [30] It has been reported the cause of this unique structure is that the laser beam fed out by the transmission fiber has a top-hat profile lowering the peak irradiance and thus reducing the ability of plasma absorbing laser energy at the early stage of its generation. [1] Therefore, the air component of the plasma front is insufficiently excited and the sharp decrease in the number density of excited particles results in a rapid dimming of the plasma front luminescence.…”

Section: Evolutionary Properties Of Plasma Dynamicsmentioning

confidence: 99%

Effects of pulse energy ratios on plasma characteristics of dual-pulse fiber-optic laser-induced breakdown spectroscopy

Yan¹,

Ying²,

Liu³

et al. 2022

Chinese Phys. B

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Laser-induced plasmas of dual-pulse fiber-optic laser-induced breakdown spectroscopy with different pulse energy ratios are studied by using the optical emission spectroscopy (OES) and fast imaging. The energy of the two laser pulses is independently adjusted within 0–30 mJ with the total energy fixed at 30 mJ. The inter-pulse delay remains 450 ns constantly. As the energy share of the first pulse increases, a similar bimodal variation trend of line intensities is observed. The two peaks are obtained at the point where the first pulse is half or twice of the second one, and the maximum spectral enhancement is at the first peak. The bimodal variation trend is induced by the change in the dominated mechanism of dual-pulse excitation with the trough between the two peaks caused by the weak coupling between the two mechanisms. By increasing the first pulse energy, there is a transition from the ablation enhancement dominance near the first peak to the plasma reheating dominance near the second peak. The calculations of plasma temperature and electron number density are consistent with the bimodal trend, which have the values of 17024.47 K, 2.75×1017 cm−3 and 12215.93 K, 1.17 × 1017 cm−3 at a time delay of 550 ns. In addition, the difference between the two peaks decreases with time delay. With the increase in the first pulse energy share, the plasma morphology undergoes a transformation from hemispherical to shiny-dot and to oblate-cylinder structure during the second laser irradiation from the recorded images by using an intensified charge-coupled device (ICCD) camera. Correspondingly, the peak expansion distance of the plasma front first decreases significantly from 1.99 mm in the single-pulse case to 1.34 mm at 12/18 (dominated by ablation enhancement) and then increases slightly with increasing the plasma reheating effect. The variations in plasma dynamics verify that the change of pulse energy ratios leads to a transformation in the dual-pulse excitation mechanism.

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Section: Evolutionary Properties Of Plasma Dynamicsmentioning

confidence: 99%

Effects of pulse energy ratios on plasma characteristics of dual-pulse fiber-optic laser-induced breakdown spectroscopy

Yan¹,

Ying²,

Liu³

et al. 2022

Chinese Phys. B

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“…The pulse introduced in the ber is attenuated by absorption or scattering in the ber core. [14][15][16] As the increased pulse energy to the ber for compensation might damage the core surface when using intense nanosecond pulses, the energy that can be introduced into the ber is limited. 9,14 Using large core bers might mitigate this disadvantage; however, they are less exible, making handling them more challenging.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous analysis of gadolinium and surface imaging using a fiber-coupled acoustic wave-assisted microchip LIBS system

Batsaikhan,

Ohba,

Karino

et al. 2024

J. Anal. At. Spectrom.

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“…[20][21][22][23][24][25][26] Recently, compact DPSS lasers with low repetition rate (10 Hz) and the usual energy per pulse in the range of 10-100 mJ were assessed for analytical applications. [27][28][29] Another crucial part of a LIBS system is the spectral device and detector. Miniaturization of the spectrograph inevitably worsens the spectral resolution and enhances aberrations, on the one hand, but also increases the aperture ratio.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a low-energy high repetition rate DPSS laser for quantitative analysis of marine ferromanganese nodules by LIBS

Popov

Akhmetzhanov

Drozdova

et al. 2022

J. Anal. At. Spectrom.

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Compact diode-pumped Nd:YAG laser for remote analysis of low-alloy steels by laser-induced breakdown spectroscopy

Abstract: A low weight diode-pumped Nd:YAG laser (400 g, 1064 nm, 5 ns, 130 mJ per pulse) was developed for a compact laser-induced breakdown spectroscopy (LIBS) system to be installed on a robotized arm.

Cited by 34 publications

References 35 publications

Effects of pulse energy ratios on plasma characteristics of dual-pulse fiber-optic laser-induced breakdown spectroscopy

Effects of pulse energy ratios on plasma characteristics of dual-pulse fiber-optic laser-induced breakdown spectroscopy

Simultaneous analysis of gadolinium and surface imaging using a fiber-coupled acoustic wave-assisted microchip LIBS system

Assessment of a low-energy high repetition rate DPSS laser for quantitative analysis of marine ferromanganese nodules by LIBS

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