title: Time-resolved coherent Raman spectroscopy by high-speed pump-probe delay scanning.
abstract: Using a spinning window pump-probe delay scanner, we demonstrate a means of acquiring time-resolved vibrational spectra at rates up to 700 Hz. The time-dependent phase shift accumulated by the probe pulse in the presence of a coherently vibrating sample gives rise to a Raman-induced frequency shifting readily detectable in a balanced detector. This rapid delay scanning system represents a 23-fold increase in averaging speed and is >10× faster than state-of-the-art voice coil delay lines. These advancements make pump-probe spectroscopy a more practical means of imaging complex media.
authors.forename: S R
authors.initials: SR
authors.lastname: Domingue
authors.forename: D G
authors.initials: DG
authors.lastname: Winters
authors.forename: R A
authors.initials: RA
authors.lastname: Bartels
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D057054:Molecular Imaging / Q000295:instrumentation*; D015336:Molecular Probe Techniques / Q000295:instrumentation*; D010783:Photometry / Q000295:instrumentation*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*