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

Author:

Riebe Daniel1,Beitz Toralf1,Dosche Carsten12,Löhmannsröben Hans-Gerd1,Raab Volker3,Raab Corinna3,Unverzagt Matthias4

Affiliation:

1. Physical Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany

2. Department of Chemistry, University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26129 Oldenburg, Germany

3. Optikexpertisen, Amundsenstrasse 10, 14469 Potsdam, Germany

4. ENPASOS—Enterprise Patterns and Solutions GmbH, Haintürchenstr. 2, 61462 Königstein, Germany

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.

Publisher

SAGE Publications

Subject

Spectroscopy,Instrumentation

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