Single source coherent anti-Stokes Raman microspectroscopy using spectral focusing

Langbein, Wolfgang; Rocha-Mendoza, Israel; Borri, Paola
August 2009
Applied Physics Letters;8/24/2009, Vol. 95 Issue 8, p081109
Academic Journal
We demonstrate coherent anti-Stokes Raman scattering (CARS) microspectroscopy using a single Ti:sapphire laser oscillator and simple passive optical elements. Spectral selection by dichroic mirrors and linear chirping by glass elements creates a vibrational excitation tuneable over a large spectral range (∼800–2200 cm-1) with adjustable spectral resolution (∼10–100 cm-1). We furthermore demonstrate the applicability of differential CARS, enhancing the chemical selectivity, with the proposed single-laser configuration.


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