Open AccessBackground-suppressed SRS fingerprint imaging with a fully integrated system using a single optical parametric oscillator
Author(s) -
Alberto Lombardini,
Pascal Berto,
Julien Duboisset,
Esben Ravn Andresen,
Sandro Heuke,
Edlef Büttner,
Ingo Rimke,
Sébastien Vergnole,
Vasyl Shinkar,
Philippe de Bettignies,
Hervé Rigneault
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.390381
Subject(s) - raman scattering , optics , raman spectroscopy , signal (programming language) , optical parametric oscillator , excitation , laser , nonlinear optics , signal beam , parametric statistics , coherent anti stokes raman spectroscopy , physics , beam (structure) , materials science , optoelectronics , computer science , statistics , mathematics , quantum mechanics , programming language
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.