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Proceedings Paper

Advantages of coherent antistokes Raman scattering (CARS) in environmental monitoring
Author(s): Ralf Paetzold; Eberhard Voss; Thorsten de Vries; H. Darpel; Angelika Anders
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Paper Abstract

The objective of this investigation was to develop a fast method for the in-situ characterization of chemicals solved in water based on Coherent Antistokes Raman Scattering (CARS). In order to test the potential of CARS as a tool for the in-situ spectroscopy scanning and multiplex CARS techniques were investigated. Polarization CARS (PCARS) was used to reduce the nonvibrational resonant signal generated by the electron cloud of the solvent molecules. The spectra of some alcohols and pollutants such as pyridine, nitrate and sulfate were investigated. Computer simulations were applied for the evaluation of the CARS spectra. The most evident advantage of CARS in comparison with other Raman methods is the very short time to achieve a spectrum. The shortest time to get a spectrum is limited by the length of the laser pulse (e.g. 5 ns). In addition no sample preparation is necessary.

Paper Details

Date Published: 16 September 1999
PDF: 8 pages
Proc. SPIE 3821, Environmental Sensing and Applications, (16 September 1999); doi: 10.1117/12.364196
Show Author Affiliations
Ralf Paetzold, Univ. of Hannover (Germany)
Eberhard Voss, Univ. of Hannover (Germany)
Thorsten de Vries, Univ. of Hannover (Germany)
H. Darpel, Univ. of Hannover (Germany)
Angelika Anders, Univ. of Hannover (Germany)


Published in SPIE Proceedings Vol. 3821:
Environmental Sensing and Applications
Michel R. Carleer; Moira Hilton; Torsten Lamp; Rainer Reuter; George M. Russwurm; Klaus Schaefer; Konradin Weber; Klaus C. H. Weitkamp; Jean-Pierre Wolf; Ljuba Woppowa, Editor(s)

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