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1 Ghost imaging: coincidence measurements of two beams of entangled photons—one of which interacts with an object and one of which doesn’t—can be used to reconstruct a “ghost” image of the object.
2 Isointensity plot of an oblique spatiotemporal Bessel–Airy wave packet.
3 Peppers image. (a) Original object (b) Conventional solution with minimum-error threshold (Lloyd-Max): SNR = 13.72 dB (c) Binary acquisition using our method (d) Reconstruction using our method: SNR = 19.10 dB
4 Schematic diagram of single-prism pulse compressor.
5 Normalized net round-trip gain G s p as a function of pump-signal and idler-signal phase mismatches δ ν p s Ω L and δ ν i s Ω L , respectively, for N = ( π / 2 ) 2 . GVD is neglected, so the AM and PM eigenmodes are decoupled. (a) Gain for AM eigenmodes, (b) gain for PM eigenmodes.
6 Normalized intensity (top) and phase (bottom) profiles of some superpositions of Laguerre–Gaussian modes: L G 01 + L G 05 , L G 0 − 5 + L G 05 , and L G 10 + L G 05 (left to right).
7 Photograph of two large-area 1780 lines/mm diffraction gratings ( 420    mm × 450    mm ) used at high incidence in a pulse compressor for the high-energy PETAL laser [79]. The diffraction gratings are made of dielectrics; see Section 6.1b.
8 Normalized linear Stokes vector components demonstrate polarization synthesis.
9 Experimental results using the proposed method: some typical 3-D geometries of the human face mask in wireframe mode.
10 Examples of buccal squamous epithelial cells found on prepared specimen slides. (a) Representative transmission image of two overlapping cells and (d) the corresponding spatially resolved map Σ(x, y) calculated by PWS. (b) Example of a folded isolated cell and (e) the corresponding map of Σ. (c) Isolated, non-folded cell classified as “suitable” for our study and (f) the corresponding Σ(x, y).
11 Co-registered image of the change in blood flow image (Fig. 3A) with the projection view image of the blood vessel network obtained by the OMAG method after the injury (Fig. 4B). The color map is the same as in Fig. 3A. The grayscale of the OMAG image was inverted such that the blood vessels appear dark for better contrast.
12 WFDI-based phase profile of a cardiomyocyte during a single beating cycle, 40 × . White horizontal scale bar represents 10 µm. Vertical color bar is in radians. Dynamics, 120 fps for 1 sec: Media 3.
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