Ultimate signal-to-noise ratio in CARS measurements using scanning multichannel technique

Bulat N. Toleutaev; Cees Otto; Jan Greve; Nikolai I. Koroteev

doi:10.1117/12.197438

2 January 1995 Ultimate signal-to-noise ratio in CARS measurements using scanning multichannel technique

Bulat N. Toleutaev, Cees Otto, Jan Greve, Nikolai I. Koroteev

Proceedings Volume 2370, 5th International Conference on Laser Applications in Life Sciences; (1995) https://doi.org/10.1117/12.197438
Event: Laser Applications in Life Sciences: 5th International Conference, 1994, Minsk, Belarus

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.

Citation Download Citation

Bulat N. Toleutaev, Cees Otto, Jan Greve, and Nikolai I. Koroteev "Ultimate signal-to-noise ratio in CARS measurements using scanning multichannel technique", Proc. SPIE 2370, 5th International Conference on Laser Applications in Life Sciences, (2 January 1995); https://doi.org/10.1117/12.197438

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