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Proceedings Paper

Ultimate signal-to-noise ratio in CARS measurements using scanning multichannel technique
Author(s): Bulat N. Toleutaev; Cees Otto; Jan Greve; Nikolai I. Koroteev
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Paper Abstract

Due to the coherent nature of the third order CARS process the spectra obtained are often seriously corrupted by the noise brought by the laser pulse-to-pulse fluctuations. A broadband (multiplex) CARS technique is known to be an efficient mean to diminish the noise contributed by the laser power fluctuations as well as the imperfections in the spatial and temporal coherence of laser beams. In this work, we coupled the broadband CARS scheme with the `scanning-multichannel' detection technique. By combining several multichannel Raman spectra detected by a CCD camera at different positions of a monochromator, the authors have achieved (1) enhanced dynamic range, (2) large spectral length, (3) improved accuracy of peak position and bandwidth determination due to an increased density of measurement points and (4) elimination of the variation in the sensitivity and noise characteristics of each detector element.

Paper Details

Date Published: 2 January 1995
PDF: 2 pages
Proc. SPIE 2370, 5th International Conference on Laser Applications in Life Sciences, (2 January 1995); doi: 10.1117/12.197438
Show Author Affiliations
Bulat N. Toleutaev, Moscow State Univ. (Russia)
Cees Otto, Univ. of Twente (Netherlands)
Jan Greve, Univ. of Twente (Netherlands)
Nikolai I. Koroteev, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 2370:
5th International Conference on Laser Applications in Life Sciences
Pavel A. Apanasevich; Nikolai I. Koroteev; Sergei G. Kruglik; Victor N. Zadkov, Editor(s)

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