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

2009; Optica Publishing Group; Volume: 34; Issue: 18 Linguagem: Inglês

10.1364/ol.34.002847

1539-4794

Günther Krauss, Tobias Hanke, Alexander Sell, Daniel Träutlein, Alfred Leitenstorfer, Romedi Selm, Martin Winterhalder, Andreas Zumbusch,

Laser-Matter Interactions and Applications

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 μm. 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.