Journal Highlight: Tunable optical setup with high flexibility for spectrally resolved coherent anti-Stokes Raman scattering microscopy

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  • Published: Aug 8, 2011
  • Channels: Raman
thumbnail image: Journal Highlight: Tunable optical setup with high flexibility for spectrally resolved coherent anti-Stokes Raman scattering microscopy

Tunable optical setup with high flexibility for spectrally resolved coherent anti-Stokes Raman scattering microscopy

Laser Physics Letters, 2011, 8, 541-546
G. Bergner, D. Akimov, S. Schluecker, H. Bartelt, B. Dietzek, J. Popp

Abstract: A simplified setup for coherent anti-Stokes Raman scattering (CARS) microscopy is introduced, which allows for recording CARS images with 30 cm-1 excitation band-width for probing Raman bands between 500 and 900 cm-1 with minimal requirements for alignment. The experimental arrangement is based on electronic switching between CARS images recorded at different Raman resonances by combining a photonic crystal fiber (PCF) as broadband light source and an acousto-optical programmable dispersive filter (AOPDF) as tunable wavelength filter. Such spatial light modulator enables selection of a narrow-band spectrum to yield high vibrational contrast and hence chemical contrast in the resultant CARS images. Furthermore, an experimental approach to reconstruct spectral information from CARS image contrast is introduced.

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 A simplified setup for coherent anti-Stokes Raman scattering microscopy allows for recording images with 30 cm<sup>-1</sup> excitation band-width for probing Raman bands between 500 and 900 cm<sup>-1</sup> with minimal requirements for alignment

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