Article

Time-resolved two color single-beam CARS employing supercontinuum and femtosecond pulse shaping

Physikalische Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35043 Marburg, Germany
Optics Communications DOI:10.1016/j.optcom.2006.02.065 pp.488-493

ABSTRACT Using femtosecond pulse shaping techniques to coherently control the signal generation, a single-beam approach for truly time-resolved coherent anti-stokes Raman scattering (CARS) spectroscopy is presented and demonstrated with a molecular sample in liquid phase. In our experimental realization, compressed supercontinuum output of a microstructured fiber is actively shaped in phase to provide two delayed pulses of different color for time-resolved pump–probe measurements. As a compact and experimentally robust approach, it greatly facilitates the application of femtosecond time-resolved CARS in microscopy with chemical contrast.

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Keywords

chemical contrast
 
coherently control
 
compact
 
compressed supercontinuum output
 
experimentally robust approach
 
femtosecond pulse
 
femtosecond time-resolved CARS
 
molecular sample
 
pulses
 
single-beam approach
 
time-resolved coherent anti-stokes Raman scattering
 
time-resolved pump–probe measurements