30 April 2009 Microsystem light source at 671 nm for shifted excitation Raman difference spectroscopy
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Abstract
A novel compact wavelength stabilized diode laser system at 671 nm on a micro-optical bench as a light source for shifted excitation Raman difference spectroscopy (SERDS) is presented. Two broad-area gain media in separate laser cavities are used with two reflection Bragg-gratings with slightly different center wavelengths. A constant wavenumber difference of 13 cm-1 ± 1.3 cm-1 together with a spectral width below 100 pm is obtained up to output powers of 250 mW. The suitability of this light source for SERDS is demonstrated using Raman spectra of ethanol with increasing concentrations of cresyl violet as fluorescent contaminant.
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M. Maiwald, M. Maiwald, H. Schmidt, H. Schmidt, B. Sumpf, B. Sumpf, H.-D. Kronfeldt, H.-D. Kronfeldt, G. Erbert, G. Erbert, } "Microsystem light source at 671 nm for shifted excitation Raman difference spectroscopy", Proc. SPIE 7312, Advanced Environmental, Chemical, and Biological Sensing Technologies VI, 73120G (30 April 2009); doi: 10.1117/12.817908; https://doi.org/10.1117/12.817908
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