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Proceedings Paper

Single-shot time stretch stimulated Raman spectroscopy (Conference Presentation)
Author(s): Francesco Saltarelli; Vikas Kumar; Daniele Viola; Francesco Crisafi; Fabrizio Preda; Giulio Cerullo; Dario Polli

Paper Abstract

Stimulated Raman scattering spectroscopy is a powerful technique for label-free molecular identification, but its broadband implementation is technically challenging. We introduce and experimentally demonstrate a novel approach based on photonic time stretch. The broadband femtosecond Stokes pulse, after interacting with the sample, is stretched by a telecom fiber to 15ns, mapping its spectrum in time. The signal is sampled through a fast analog-to-digital converter, providing single-shot spectra at 80-kHz rate. We demonstrate 10^-5 sensitivity over 500 cm-1 in the C-H region. Our results pave the way to high-speed broadband vibrational imaging for materials science and biophotonics.

Paper Details

Date Published: 21 April 2017
PDF: 1 pages
Proc. SPIE 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II, 100890E (21 April 2017); doi: 10.1117/12.2270770
Show Author Affiliations
Francesco Saltarelli, Politecnico di Milano (Italy)
Vikas Kumar, Politecnico di Milano (Italy)
Daniele Viola, Politecnico di Milano (Italy)
Francesco Crisafi, Politecnico di Milano (Italy)
Fabrizio Preda, Politecnico di Milano (Italy)
Giulio Cerullo, Politecnico di Milano (Italy)
Dario Polli, Politecnico di Milano (Italy)

Published in SPIE Proceedings Vol. 10089:
Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II
Bahram Jalali; Daniel R. Solli; Sergei K. Turitsyn; Günter Steinmeyer; Neil G. R. Broderick, Editor(s)

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