Remote Elemental Analysis by Laser-Induced Breakdown Spectroscopy Using a Fiber-Optic Cable

Cremers, David A.; Barefield, J. E.; Koskelo, Aaron C.

doi:10.1366/0003702953964589

Cited by 150 publications

(43 citation statements)

References 2 publications

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“…In these situations or when the environment is too aggressive or the access restriction makes it difficult to induce the plasma or acquire the light, fiber optic cables (FOCs) or bundles are used [44][45][46]. Although the most common optical fibers in LIBS are made of fused silica (with diameters between 50 µm and 1 mm), different kinds of fibers such as photonic-crystal fibers are used too [47].…”

Section: Optical Fibersmentioning

confidence: 99%

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Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

2012

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Laser-induced breakdown spectroscopy (LIBS) is a technique that provides an accurate in situ quantitative chemical analysis and, thanks to the developments in new spectral processing algorithms in the last decade, has achieved a promising performance as a quantitative chemical analyzer at the atomic level. These possibilities along with the fact that little or no sample preparation is necessary have expanded the application fields of LIBS. In this paper, we review the state of the art of this technique, its fundamentals, algorithms for quantitative analysis or sample classification, future challenges, and new application fields where LIBS can solve real problems.

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Section: Optical Fibersmentioning

confidence: 99%

“…Optical fiber technologies can be used to detect other significant signals from plasma such as shockwaves [46]. Plasma compresses the surrounding media and generates a shockwave.…”

Section: Optical Fibersmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

2012

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“…However, the pre-spark shows less precision than that demonstrated by either the UV/IR single-pulse or the plasma reheat, see Table 2. [32][33][34]. This exhibits the evolution LIBS is making as a choice analytical technique in the forensic science community.…”

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confidence: 93%

Wavelength Dependence on the Forensic Analysis of Glass by Laser Induced Breakdown Spectroscopy

Cahoon¹,

Almirall²

2009

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Laser Induced Breakdown Spectroscopy (LIBS) can be used for the chemical characterization of glass to provide evidence of an association between a fragment found at a crime scene to a source of glass of known origin. Two different laser irradiances, 266 nm and 1064 nm, were used to conduct qualitative and quantitative analysis of glass standards. Single-pulse and double-pulse configurations and lens-to-sample-distance (LTSD) settings were optimized to yield the best laser-glass coupling. Laser energy and acquisition timing delays were also optimized to ABSTRACTLaser Induced Breakdown Spectroscopy (LIBS) can be used for the chemical characterization of glass to provide evidence of an association between a fragment found at a crime scene to a source of glass of known origin. Two different laser irradiances, 266 nm and 1064 nm, were used to conduct qualitative and quantitative analysis of glass standards. Single-pulse and double-pulse configurations and lens-to-sample-distance (LTSD) settings were optimized to yield the best laser-glass coupling. Laser energy and acquisition timing delays were also optimized to result in the highest signal to noise ratio. The crater morphology was examined and the mass removed was calculated for both the 266 nm and 1064nm irradiations. The analytical figures of merit suggest that the 266 nm and 1064 nm wavelengths are capable of good performance for the forensic chemical characterization of glass. The results presented here suggest that the 266 nm laser produces a better laser-glass matrix coupling resulting in a better stoichiometric representation of the glass sample. The 266 nm irradiance is therefore recommended for the forensic analysis and comparison of glass samples.

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“…By spectrally analyzing the line emissions from the luminous plasmas, the elemental compositions can be deduced. LIBS has been applied in a wide range of applications, such as aerosol detection [1], artwork diagnostics [2], and remote elemental analysis [3]. LIBS is also a potential tool for real-time monitoring of radioactive materials [4].…”

Section: Introductionmentioning

confidence: 99%

Generation of high-temperature and low-density plasmas for improved spectral resolutions in laser-induced breakdown spectroscopy

He¹,

Wei²,

Li³

et al. 2011

Opt. Express

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Improved spectral resolutions were achieved in laser-induced breakdown spectroscopy (LIBS) through generation of high-temperature and low-density plasmas. A first pulse from a KrF excimer laser was used to produce particles by perpendicularly irradiating targets in air. A second pulse from a 532 nm Nd:YAG laser was introduced parallel to the sample surface to reablate the particles. Optical scattering from the first-pulse plasmas was imaged to elucidate particle formation in the plasmas. Narrower line widths (full width at half maximums: FWHMs) and weaker self-absorption were observed from time-integrated LIBS spectra. Estimation of plasma temperatures and densities indicates that high temperature and low density can be achieved simultaneously in plasmas to improve LIBS resolutions.

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Remote Elemental Analysis by Laser-Induced Breakdown Spectroscopy Using a Fiber-Optic Cable

Cited by 150 publications

References 2 publications

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

Wavelength Dependence on the Forensic Analysis of Glass by Laser Induced Breakdown Spectroscopy

Generation of high-temperature and low-density plasmas for improved spectral resolutions in laser-induced breakdown spectroscopy

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