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Proceedings Paper

Broadband stimulated Raman scattering microscopy (Conference Presentation)
Author(s): Dario Polli; Alejandro De La Cadena; Carlo Valensise; Daniele Viola; Giulio N. Cerullo

Paper 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.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11252, Advanced Chemical Microscopy for Life Science and Translational Medicine, 1125219 (10 March 2020); doi: 10.1117/12.2544738
Show Author Affiliations
Dario Polli, Politecnico di Milano (Italy)
Alejandro De La Cadena, Politecnico di Milano (Italy)
Carlo Valensise, Politecnico di Milano (Italy)
Daniele Viola, Politecnico di Milano (Italy)
Giulio N. Cerullo, Politecnico di Milano (Italy)

Published in SPIE Proceedings Vol. 11252:
Advanced Chemical Microscopy for Life Science and Translational Medicine
Ji-Xin Cheng; Wei Min; Garth J. Simpson, Editor(s)

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