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Impressum
(c) 2002 BMO

"Gated heterodyne coherent anti-Stokes Raman scattering for high-contrast vibrational imaging"
M. Greve, B. Bodermann, H. R. Telle, P. Baum, and E. Riedle
Proc. SPIE 5856, 41 (2005)


Abstract:
We present a novel detection scheme for coherent anti-Stokes Raman scattering (CARS) which is capable of substantially suppressing coherent background signals which are a basic problem associated with CARS. It exploits the fixed phase relationship between pump, Stokes and CARS fields together with the strong phase coherence in supercontinua generated by femtosecond pulses. Three phase-locked noncollinearly phase-matched optical parametric amplifiers (NOPAs) seeded by a common white-light continuum are used for the realization of a heterodyne signal detection. In combination with proper pulse timing, i.e. appropriately time-delayed probing and eterodyning, a gating mechanism is provided to significantly suppress resonant and nonresonant solvent ackground signals. Therefore the demonstrated technique is suitable for high-contrast vibrational imaging.

BMO authors (in alphabetic order):
Peter Baum
Eberhard Riedle

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Letzte Änderung: 2016-09-14 13:34