| Zugriffsnummer | 17481 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Gated heterodyne coherent anti-Stokes Raman scatttering for high-contrast vibrational imaging |
| Autor(in); Institution |
Greve, Marco; 4.5, Optische Technologien, PTB-Braunschweig
Bodermann, Bernd; 4.2, Bild- und Wellenoptik, PTB-Braunschweig
Telle, Harald; 4.5, Optische Technologien, PTB-Braunschweig
Baum, Peter; Ludwig-Maximilians-Universität, Lehrstuhl für BioMolekulare Optik, München, GERMANY
Riedle, Eberhard; Ludwig-Maximilians-Universität, Lehrstuhl für BioMolekulare Optik, München, GERMANY
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| Quelle/Jahr | Optical measurement systems for industrial inspection IV : 13.-17. June 2005, Munich, Germany:(2005), 41 - 48 |
| Schriftenreihe | Proceedings of SPIE: 5856 |
| ISBN | 0-8194-5856-2 |
| Verlag | Bellingham, Wash.: SPIE |
| Konferenzangaben | Optical measurement systems for industrial inspection IV, Munich, 13-17, June, 2005, Germany |
| Freie Schlagworte | coherent anti-Stokes Raman scattering ; coherent optical effects ; parametric oscillators and amplifiers ; interference ; four-wave mixing |
| Zusammenfassung | 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 heterodyning, a gating mechanism is provided to significantly suppress resonant and nonresonant solvent background signals. Therefore the demonstrated technique is suitable for high-contrast vibrational imaging. |
