AOTF Raman spectrometer for remote detection of explosives

Gupta, Neelam; Dahmani, Rachid

doi:10.1016/s1386-1425(99)00265-6

Cited by 47 publications

(23 citation statements)

References 9 publications

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“…A wide variety of techniques has been successfully used to detect trace amounts of explosives, including cavity ring‐down spectroscopy, Raman spectroscopy, laser‐induced breakdown spectroscopy, and ion mobility spectrometry . Among these detection technologies, mass spectrometry featuring high sensitivity, specificity, and short response times has achieved remarkable results in previous detection of explosives .…”

Section: Introductionmentioning

confidence: 99%

Rapid screening of explosives in ambient environment by aerodynamic assisted thermo desorption mass spectrometry

et al. 2016

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Rapid, direct, and trace detection of explosives in an open environment is of particular need in homeland and/or transportation security. In this work, an aerodynamic assisted thermo desorption mass spectrometry method was developed for the direct quantitative analyses of explosives from a distance. Remote non-volatile explosive sensing was achieved for 2, 4, 6-trinitrotoluene, trinitrohexahydro-1, 3, 5-triazine, 8701 (main ingredient: RDX 98.5%), and C4 (a type of plastic explosive) with a distance of 0.65 m. Furthermore, a close to 324 cm effective sampling area could be achieved, and the limits of detection are in the ng range. This device can be deployed in airports and subway stations for high-throughput and automatic luggage/personnel screening of prohibited articles, such as explosives and illicit drugs. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Rapid screening of explosives in ambient environment by aerodynamic assisted thermo desorption mass spectrometry

et al. 2016

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“…The filtered central wavelength is dependent on the frequency of the radio frequency (RF) signal injected into the AOTF. Owing to its salient features, the AOTF has been used in various applications, such as spectroscopy [1][2][3][4], laser controlling [5][6][7], monochromator [8][9][10], and spectral imaging [11][12][13][14][15]. The tuning relation, defined as the function relating the RF frequency and the filtered wavelength, is a significant specification.…”

Section: Introductionmentioning

confidence: 99%

Combined laser and broadband light for measuring the tuning relation of an acousto-optic tunable filter

Zhao

Zhang

et al. 2013

Appl. Opt.

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To improve the tuning relation accuracy of an acousto-optic tunable filter, the conventional separated laser and broadband light methods were combined. The single laser test measured one accurate point and corrected the large amounts of data obtained from the broadband light method. The final tuning relation was fitted by the corrected data. A simulation and an experiment for several methods were conducted for comparison. The relative error was reduced from 0.2% to 0.05% in the 430~785 nm range. The equivalent wavelength accuracy improved from 1 to 0.2 nm. This method solved the problems associated with the use of a single laser source with few test data values and a single broadband light source with poor collimation.

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“…2,3,4 It has proven successful in such applications as narcotic identification, 5,6 fibre identification, 7 paints/pigments analysis, 8 gunshot residue analysis, 9 gemstone identification, 10 and finally explosive identification, 11 and detection. 12,13,14 Hazardous materials such as asbestos have also been successfully analysed using Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Qualitative and quantitative analysis of chlorinated solvents using Raman spectroscopy and machine learning

et al. 2005

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AOTF Raman spectrometer for remote detection of explosives

Cited by 47 publications

References 9 publications

Rapid screening of explosives in ambient environment by aerodynamic assisted thermo desorption mass spectrometry

Rapid screening of explosives in ambient environment by aerodynamic assisted thermo desorption mass spectrometry

Combined laser and broadband light for measuring the tuning relation of an acousto-optic tunable filter

Qualitative and quantitative analysis of chlorinated solvents using Raman spectroscopy and machine learning

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