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Opt Lett. 2009 Sep 15;34(18):2847-9. doi: 10.1364/OL.34.002847.

Compact coherent anti-Stokes Raman scattering microscope based on a picosecond two-color Er:fiber laser system.

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  • 1Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany.


We present a compact coherent anti-Stokes Raman scattering microscope based on a widely tunable picosecond Er:fiber laser. Intense and bandwidth-limited 1 ps pump pulses at a center wavelength of 775 nm are generated via frequency mixing within the broadband fundamental at 1.55 microm. Narrowband Stokes pulses are obtained by frequency shifting of solitons in a highly nonlinear bulk fiber and subsequent second-harmonic generation. The tuning range from 850 nm to 1100 nm gives access to vibrational resonances between 1150 cm(-1) and 3800 cm(-1). A first imaging application in the spectral region of CH stretch vibrations is demonstrated.

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