Spatially compressed dual-wavelength excitation Raman spectrometer

The design and operation of a novel dual-laser excitation Raman instrument is described. The use of two lasers of differing wavelengths allows for a Raman spectrum covering all fundamental modes of vibration to be collected while minimizing fluorescence and allowing for spatial compression of the sp...

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Veröffentlicht in:	Applied optics (2004) 2014-05, Vol.53 (15), p.3333-3340
Hauptverfasser:	Cooper, John B, Marshall, Sarah, Jones, Richard, Abdelkader, Mohamed, Wise, Kent L
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Coolers Excitation Fluorescence Lasers Reconstruction Thermoelectricity Wavelengths
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creator	Cooper, John B Marshall, Sarah Jones, Richard Abdelkader, Mohamed Wise, Kent L
description	The design and operation of a novel dual-laser excitation Raman instrument is described. The use of two lasers of differing wavelengths allows for a Raman spectrum covering all fundamental modes of vibration to be collected while minimizing fluorescence and allowing for spatial compression of the spectrum on an imaging detector. The use of diode lasers with integrated distributed Bragg reflector gratings facilitates the use of an integrated thermoelectric cooler to allow collection of shifted excitation spectra for both of the lasers, further enhancing the rejection of fluorescence. An example is given, which uses seven excitation wavelengths for each laser to reconstruct the Raman spectrum of a solvent in the presence of a highly fluorescent dye by using a sequentially shifted excitation Raman reconstruction algorithm.
doi_str_mv	10.1364/AO.53.003333
format	Article
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source	Alma/SFX Local Collection; Optica Publishing Group Journals
subjects	Algorithms Coolers Excitation Fluorescence Lasers Reconstruction Thermoelectricity Wavelengths
title	Spatially compressed dual-wavelength excitation Raman spectrometer
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