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Single source coherent anti-Stokes Raman microspectroscopy using spectral focusing
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View: Figures


Image of FIG. 1.
FIG. 1.

Sketch of the experimental setup. : Stokes and Pump beams, RG9: long pass filter, D: dichroic mirror, M: silver mirror, SF57: glass block, L: lens, R: retroreflector, PH: pinhole, SM: scanning mirror, MO: microscope objective, S: sample, F: bandpass filter, PMT: photomultiplier. D-CARS: differential CARS optics. Inset: typical spectra of laser, Pump, and Stokes.

Image of FIG. 2.
FIG. 2.

(a) Measured CARS in PS (black) and agar (gray) as function of the delay . (b) CARS ratio determined from (a) and spontaneous Raman spectrum (Ref. 15) of PS. The images are lateral sections of the PS bead for IFDs as labeled. Linear gray scale from zero (black). at 0.1 ms/pixel. The yellow lines are horizontal cuts through the bead center. Pump power 7 mW, Stokes power 8 mW.

Image of FIG. 3.
FIG. 3.

(a) Sum-CARS intensity from a PS bead versus . The difference is indicated by vertical lines. Inset: CARS resonant line-shapes (see text). (b) D-CARS corresponding to (a). Bead cross-sections are shown at (left) and (right) on a gray scale from −0.07 (black) to 0.14 (white). Other conditions as in Fig. 2.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Single source coherent anti-Stokes Raman microspectroscopy using spectral focusing