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10 March 2020 Broadband stimulated Raman scattering microscopy (Conference Presentation)
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We present several approaches to broadband stimulated Raman scattering (SRS): Fourier-Transform SRS (FT-SRS), Photonic Time Stretch SRS (PTS-SRS) and a multi-channel lock-in amplifier (M-LIA). In FT-SRS the broadband Stokes pulse is sent to a birefringent delay line that creates two collinear replicas, whose interferogram is measured by a single detector. The pump-induced change of the interferogram, measured by a lock-in amplifier, gives, after Fourier transform, the SRS spectrum. In PTS-SRS the broadband Stokes pulse is temporally stretched by an optical fiber to a duration of a few nanoseconds and sampled by a high-frequency analog-to-digital converter, allowing measurement of SRS spectra at MHz repetition rates. Finally, a M-LIA allows sensitive measurement of the SRS spectrum at a number of frequencies from 4 to 32.
Conference Presentation
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Dario Polli, Alejandro De La Cadena, Carlo Valensise, Daniele Viola, and Giulio N. Cerullo "Broadband stimulated Raman scattering microscopy (Conference Presentation)", Proc. SPIE 11252, Advanced Chemical Microscopy for Life Science and Translational Medicine, 1125219 (10 March 2020);

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