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Opt Express. 2008 May 26;16(11):7985-96.

Application of spectral phase shaping to high resolution CARS spectroscopy.

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  • 1Optical Sciences Group, Department of Science and Technology, MESA Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands. s.postma@utwente.nl

Abstract

By spectral phase shaping of both the pump and probe pulses in coherent anti-Stokes Raman scattering (CARS) spectroscopy we demonstrate the extraction of the frequencies, bandwidths and relative cross sections of vibrational lines. We employ a tunable broadband Ti:Sapphire laser synchronized to a ps-Nd:YVO mode locked laser. A high resolution spectral phase shaper allows for spectroscopy with a precision better than 1 cm(-1) in the high frequency region around 3000 cm(-1). We also demonstrate how new spectral phase shaping strategies can amplify the resonant features of isolated vibrations to such an extent that spectroscopy and microscopy can be done at high resolution, on the integrated spectral response without the need for a spectrograph.

PMID:
18545508
[PubMed - indexed for MEDLINE]
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