Waveguide CARS spectroscopy: a new method for background suppression, using dielectric layers as a model

W.P. de Boeij, Johannes S. Kanger, Gerald Lucassen, Cornelis Otto, Jan Greve

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    25 Citations (Scopus)
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    Abstract

    Waveguide Coherent Anti-Stokes Raman Spectroscopy (CARS) can be used to measure Raman-active vibrations in thin-layer dielectric waveguides. In waveguide CARS experiments, background-free spectra can be obtained when asymmetric mode combinations are applied. The degree of suppression depends on the waveguide parameters and the wavelengths used. A new method using scanning pump and Stokes beams in waveguide CARS experiments is presented, which allows the possibility of maintaining full background suppression conditions over large spectral intervals. A small controlled change in the tuning conditions results in a heterodyning of the signal with a small amount of background, thereby enhancing the small resonant signals. Several simulations for dielectric waveguides are given.
    Original languageEnglish
    Pages (from-to)723-730
    Number of pages8
    JournalApplied spectroscopy
    Volume47
    Issue number6
    DOIs
    Publication statusPublished - 1993

    Keywords

    • METIS-129401

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