A compact collinear AOTF Raman spectrometer

Gupta, Neelam; Fell, Nicholas F.

doi:10.1016/s0039-9140(97)00145-8

Cited by 17 publications

(10 citation statements)

References 6 publications

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“…An AOTF is a compact, electronically controlled bandpass filter which operate over a wide wavelength range from the ultraviolet (UV) to the far infrared (IR). Detailed descriptions on the theory and the operating principles of the AOTF can be found in several publications [9][10][11][12][13]. Briefly, the operation of an AOTF is based on the interaction of light (incident light) with an acoustic wave in a birefringent crystal.…”

Section: Introductionmentioning

confidence: 99%

Portable Raman integrated tunable sensor (RAMiTs) for environmental field monitoring

Wabuyele

Martin

Yan

et al. 2004

Advanced Environmental, Chemical, and Biological Sensing Technologies II

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This paper describes a self-contained, portable Raman instrument that has been developed for environmental and homeland defense applications. The instrument consists of a 830-nm diode laser for excitation, an acousto-optic tunable filter (AOTF) for wavelength discrimination, and an avalanche photodiode for detection. The primary component of this system is the AOTF and it has been selected based on its spectral range along with its high resolution, ~7.5 cm -1 . Software has been developed in house using C programming language for controlling the instrument (i.e. the AOTF frequency, the signal acquisition, etc.). Evaluation of this instrument has been performed by analyzing several standard samples and comparing to a conventional Raman system. In addition to system evaluation, this paper will also discuss potential applications of this instrument to trace detection of hazardous chemicals using the Raman Integrated Tunable Sensor (RAMiTs) coupled with surface-enhance Raman scattering process.

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Section: Introductionmentioning

confidence: 99%

Portable Raman integrated tunable sensor (RAMiTs) for environmental field monitoring

Wabuyele

Martin

Yan

et al. 2004

Advanced Environmental, Chemical, and Biological Sensing Technologies II

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“…A compact colinear AOTF Raman spectrometer was developed by using a quartz AOTF and an argon laser as the excitation source. 12 AOTFs have been used to suppress effects of potential uorescence interferences in Raman spectroscopy. 13 Many more applications, too numerous to highlight, have been documented.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Quartz Acousto-Optic Tunable Filter Wavelength Selection for Inductively Coupled Plasma Atomic Emission Spectrometry

Gillespie

Carnahan

2001

Appl Spectrosc

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A quartz acousto-optic tunable filter (AOTF) is utilized as a wavelength selection device for inductively coupled plasma atomic emission spectrometry (ICP-AES). System design is detailed. Fundamental characterizations indicate that the useful spectral range exceeds the 206 to 405 nm range. Wavelength calibration is extremely accurate with the correlation coefficient of the ICP atomic emission wavelength/inverse frequency plot exceeding 0.999999. Bandpasses were measured as 0.06 nm at 226 nm and 0.36 nm at 405 nm. These values are comparable to those of a moderate-resolution monochromator. The system was characterized with 12 metals: Ag, Ba, Ca, Cd, Cr, Cu, Eu, Fe, Hg, Mg, Mn, and Pb. Detection limits are in the single to tens of ng/mL range for many metals. Linearity is demonstrated from lower concentration ranges near the detection limit.

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“…This improvement has led to the construction of several AOTF-based spectrometers for both imaging and nonimaging applications. [28][29][30][31] Recently, Gupta et al 28 have developed and demonstrated the effectiveness of an AOTFbased spectrometer that can be employed in field studies. This spectrometer employs a specially designed quartz AOTF as the dispersive element and a photomultiplier tube as the detector.…”

Section: Introductionmentioning

confidence: 99%

Development of a compact, handheld Raman instrument with no moving parts for use in field analysis

Cullum

Mobley

Chi

et al. 2000

Review of Scientific Instruments

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A new compact instrument for Raman, laser-induced breakdown, and laser-induced fluorescence spectroscopy of works of art and their constituent materials Rev. Sci. Instrum. 80, 076109 (2009); This article describes a lightweight, self-contained, field portable Raman instrument that has been developed for rapid on-site determination of primary mixture components. The instrument consists of a helium neon ͑HeNe͒ laser for excitation, an acousto-optic tunable filter ͑AOTF͒ for wavelength discrimination, and an avalanche photodiode for detection. The AOTF is the primary component of this system and has been selected based on its spectral range ͑600-900 nm͒ along with its high resolution, ϳ7.5 cm Ϫ1 . Labview™ based software for controlling the AOTF frequency and the signal acquisition has also been developed. Several different samples were analyzed ͑both solids and liquids͒ using this instrument for the evaluation of parameters such as spectral resolution, sensitivity, and data acquisition speed for certain environmentally important compounds. The results from these measurements are compared with those using a conventional laboratory Raman system consisting of a grating-based spectrograph and a charge-coupled device.

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A compact collinear AOTF Raman spectrometer

Cited by 17 publications

References 6 publications

Portable Raman integrated tunable sensor (RAMiTs) for environmental field monitoring

Portable Raman integrated tunable sensor (RAMiTs) for environmental field monitoring

Ultraviolet Quartz Acousto-Optic Tunable Filter Wavelength Selection for Inductively Coupled Plasma Atomic Emission Spectrometry

Development of a compact, handheld Raman instrument with no moving parts for use in field analysis

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