M. Maiwald^a, H. Schmidt^b, B. Sumpf^a, H.-D. Kronfeldt^b, G. Erbert^a

Published in:

Proc. SPIE, vol. 7312, no. 73120G (2009).

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.

© 2009 COPYRIGHT SPIE--The International Society for Optical Engineering. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the SPIE.

Full version in pdf-format.