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Degenerate multiwave mixing using Z-scan technique
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic of the coherent system imager. The sample is located in the focal region. The labels refer to the object , lenses , mirrors , beam splitters (, ), and spatial filters (sf).

Image of FIG. 2.
FIG. 2.

(a) The three circular apertures object. (b) and (c) Two different spatial filters placed in the image plane stopping the geometrical images of the circular apertures.

Image of FIG. 3.
FIG. 3.

Comparison between (a) the experimental acquisition and (b) the numerically calculated one of the images obtained at for . The “L” pattern appearing in (a) is the spatial filter defined in Fig. 2(c). The coordinates and are expressed in number of pixels, and the natural logarithm is used to enhance lower intensity.

Image of FIG. 4.
FIG. 4.

Experimental (stars: all the diffracted waves, points: only one diffracted beam) and theoretical (solid line) efficiency of the diffracted energy versus ; the sample position for in at . The inset shows the energy diffraction efficiency vs , the on-axis incident intensity for , where is a given sample position.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Degenerate multiwave mixing using Z-scan technique