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Updated: Aug 21, 2026

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering (CARS)
Published on: October 17, 2010
Application of an optical pulse stretcher to coherent anti-Stokes Raman spectroscopy
Frank Beyrau1, Markus Christian Weikl, Thomas Seeger
1Lehrstuhl für Technische Thermodynamik, Universität Erlangen Nürnberg, Am Weichselgarten 8, D-91058, Germany. beyrau@ltt.uni-erlangen.de
Abstract:
An external optical cavity pulse stretcher for nanosecond-long laser pulses has been applied to coherent anti-Stokes Raman spectroscopy (CARS). An increased signal-to-noise ratio was achieved for both vibrational and pure rotational CARS, while the power density of the laser beams remained constant. Moreover, it was demonstrated that the use of the pulse stretcher also leads to improved precision of the determined temperatures and concentrations as a result of repeated excitation of the dye laser.
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