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21 April 2017 Single-shot time stretch stimulated Raman spectroscopy (Conference Presentation)
Francesco Saltarelli, Vikas Kumar, Daniele Viola, Francesco Crisafi, Fabrizio Preda, Giulio Cerullo, Dario Polli
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Proceedings Volume 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II; 100890E (2017) https://doi.org/10.1117/12.2270770
Event: SPIE LASE, 2017, San Francisco, California, United States
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.
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Francesco Saltarelli, Vikas Kumar, Daniele Viola, Francesco Crisafi, Fabrizio Preda, Giulio Cerullo, and Dario Polli "Single-shot time stretch stimulated Raman spectroscopy (Conference Presentation)", Proc. SPIE 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II, 100890E (21 April 2017); https://doi.org/10.1117/12.2270770
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KEYWORDS
Raman spectroscopy
Biomedical optics
Femtosecond phenomena
Materials science
Molecular spectroscopy
Raman scattering
Spectroscopy
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