High-Resolution Spectrometer Using Combined Dispersive and Interferometric Wavelength Separation for Raman and Laser-Induced Breakdown Spectroscopy (LIBS). Issue 9 (September 2014)

• Record Type: Journal Article
• Authors: Riebe, Daniel; Beitz, Toralf; Dosche, Carsten; Löhmannsröben, Hans-Gerd; Raab, Volker; Raab, Corinna; Unverzagt, Matthias
• Is Part Of: Applied spectroscopy. Volume 68:Issue 9(2014)
• Page Start: 1030
• Page End: 1038
• Publication Date: 2014-09
• Subjects: Raman spectroscopy -- Laser-induced breakdown spectroscopy -- LIBS -- Fabry–Pérot etalon -- High-resolution spectrometer; Spectrum analysis -- Periodicals; 543.505
• DOI: 10.1366/13-07426
• Languages: English
• ISSNs: 0003-7028

Abstract

In this paper the concept of a compact high-resolution spectrometer based on the combination of dispersive and interferometric elements is presented. Dispersive elements are used to spectrally resolve the light in one direction with coarse resolution (Δλ < 0.5 nm), while perpendicular to that direction an etalon provides high spectral resolution (Δλ < 50 pm). This concept for two-dimensional spectroscopy has been implemented for the wavelength range λ = 350–650 nm. Appropriate algorithms for reconstructing spectra from the two-dimensional raw data and for wavelength calibration were established in an analysis software. Potential applications for this new spectrometer are Raman and laser-induced breakdown spectroscopy (LIBS). Resolutions down to 28 pm (routinely 54 pm) could be realized for these applications.