Background-suppressed SRS fingerprint imaging with a fully integrated system using a single optical parametric oscillator

Stimulated Raman Scattering (SRS) imaging can be hampered by non-resonant parasitic signals that lead to imaging artifacts and eventually overwhelm the Raman signal of interest. Stimulated Raman gain opposite loss detection (SRGOLD) is a three-beam excitation scheme capable of suppressing this nonli...

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Bibliographic Details
Published in:Optics express 2020-05, Vol.28 (10), p.14490-14502
Main Authors: Lombardini, Alberto, Berto, Pascal, Duboisset, Julien, Andresen, Esben Ravn, Heuke, Sandro, Büttner, Edlef, Rimke, Ingo, Vergnole, Sébastien, Shinkar, Vasyl, de Bettignies, Philippe, Rigneault, Hervé
Format: Article
Language:English
Subjects:
Engineering Sciences
Optics
Photonic
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Summary:Stimulated Raman Scattering (SRS) imaging can be hampered by non-resonant parasitic signals that lead to imaging artifacts and eventually overwhelm the Raman signal of interest. Stimulated Raman gain opposite loss detection (SRGOLD) is a three-beam excitation scheme capable of suppressing this nonlinear background while enhancing the resonant Raman signal. We present here a compact electro-optical system for SRGOLD excitation which conveniently exploits the idler beam generated by an optical parametric oscillator (OPO). We demonstrate its successful application for background suppressed SRS imaging in the fingerprint region. This system constitutes a simple and valuable add-on for standard coherent Raman laser sources since it enables flexible excitation and background suppression in SRS imaging.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.390381