Broadband stimulated Raman scattering microscopy (Conference Presentation)

Dario Polli; Alejandro De La Cadena; Carlo Valensise; Daniele Viola; Giulio N. Cerullo

doi:10.1117/12.2544738

10 March 2020 Broadband stimulated Raman scattering microscopy (Conference Presentation)

Dario Polli, Alejandro De La Cadena, Carlo Valensise, Daniele Viola, Giulio N. Cerullo

Proceedings Volume 11252, Advanced Chemical Microscopy for Life Science and Translational Medicine; 1125219 (2020) https://doi.org/10.1117/12.2544738
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

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

Citation Download Citation

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); https://doi.org/10.1117/12.2544738

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KEYWORDS

Microscopy

Raman scattering

Optical amplifiers

Raman spectroscopy

Biomedical optics

Complex systems

Materials science

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