Publications

2020
Yeminy T, Katz O. Guidestar-free image-guided wavefront-shaping. arXiv preprint arXiv:2007.03956. 2020.
Shekel N, Katz O. Using fiber-bending-generated speckles for improved working distance and background rejection in lensless micro-endoscopy. Opt. Lett. [Internet]. 2020;45 (15) :4288–4291. Publisher's VersionAbstract
Lensless flexible fiber-bundle-based endoscopes allow imaging at depths beyond the reach of conventional microscopes with a minimal footprint. These multicore fibers provide a simple solution for wide-field fluorescent imaging when the target is adjacent to the fiber facet. However, they suffer from a very limited working distance and out-of-focus background. Here, we carefully study the dynamic speckle illumination patterns generated by bending a commercial fiber bundle and show that they can be exploited to allow extended working distance and background rejection, using a super-resolution fluctuations imaging analysis of multiple frames, without the addition of any optical elements.
Weinberg G, Katz O. 100,000 frames-per-second compressive imaging with a conventional rolling-shutter camera by random point-spread-function engineering. Opt. Express [Internet]. 2020;28 (21) :30616–30625. Publisher's VersionAbstract
We demonstrate an approach that allows taking videos at very high frame-rates of over 100,000 frames per second by exploiting the fast sampling rate of the standard rolling-shutter readout mechanism, common to most conventional sensors, and a compressive-sampling acquisition scheme. Our approach is directly applied to a conventional imaging system by the simple addition of a diffuser to the pupil plane that randomly encodes the entire field-of-view to each camera row, while maintaining diffraction-limited resolution. A short video is reconstructed from a single camera frame via a compressed-sensing reconstruction algorithm, exploiting the inherent sparsity of the imaged scene.
Doktofsky D, Rosenfeld M, Katz O. Acousto optic imaging beyond the acoustic diffraction limit using speckle decorrelation. Communications Physics. 2020;3 (1) :1-8.
2019
Pascucci M, Ganesan S, Tripathi A, Katz O, Emiliani V, Guillon M. Compressive three-dimensional super-resolution microscopy with speckle-saturated fluorescence excitation. Nature communications. 2019;10 (1) :1327.
Stern G, Katz O. Noninvasive focusing through scattering layers using speckle correlations. Optics Letters. 2019;44 (1) :143–146.
Boger-Lombard J, Katz O. Passive optical time-of-flight for non line-of-sight localization. Nature Communications. 2019;10.
Katz O, Ramaz F, Gigan S, Fink M. Controlling light in complex media beyond the acoustic diffraction-limit using the acousto-optic transmission matrix. Nature communications. 2019;10 (1) :717.
2018
Doktofsky D, Rosenfeld M, Katz O. Acousto-optic tomography beyond the acoustic diffraction-limit using speckle decorrelation. arXiv preprint arXiv:1812.00400. 2018.
Salhov O, Weinberg G, Katz O. Depth-resolved speckle-correlations imaging through scattering layers via coherence gating. Optics letters. 2018;43 (22) :5528–5531.
Weiss U, Katz O. Two-photon lensless micro-endoscopy with in-situ wavefront correction. Optics Express. 2018;26 (22) :28808–28817.
2017
Hojman E, Chaigne T, Solomon O, Gigan S, Bossy E, Eldar YC, Katz O. Photoacoustic imaging beyond the acoustic diffraction-limit with dynamic speckle illumination and sparse joint support recovery. Optics Express. 2017;25 (5) :4875–4886.
Chaigne T, Arnal B, Vilov S, Bossy E, Katz O. Super-resolution photoacoustic imaging via flow-induced absorption fluctuations. Optica. 2017;4 (11) :1297–1404.
2016
Wu T, Katz O, Shao X, Gigan S. Single-shot diffraction-limited imaging through scattering layers via bispectrum analysis. Optics Letters. 2016;41 (21) :5003–5006.
Mounaix M, Andreoli D, Defienne H, Volpe G, Katz O, Grésillon S, Gigan S. Spatiotemporal coherent control of light through a multiple scattering medium with the multispectral transmission matrix. Physical review letters. 2016;116 (25) :253901.
Chaigne T, Gateau J, Allain M, Katz O, Gigan S, Sentenac A, Bossy E. Super-resolution photoacoustic fluctuation imaging with multiple speckle illumination. Optica. 2016;3 (1) :54–57.
Tsvirkun V, Sivankutty S, Bouwmans G, Katz O, Andresen ER, Rigneault H. Widefield lensless endoscopy with a multicore fiber. Optics Letters. 2016;41 (20) :4771–4774.
Porat A, Andresen ER, Rigneault H, Oron D, Gigan S, Katz O. Widefield lensless imaging through a fiber bundle via speckle correlations. Optics express. 2016;24 (15) :16835–16855.
2015
Andreoli D, Volpe G, Popoff S, Katz O, Grésillon S, Gigan S. Deterministic control of broadband light through a multiply scattering medium via the multispectral transmission matrix. Scientific reports. 2015;5.
Rosen S, Gilboa D, Katz O, Silberberg Y. Focusing and Scanning through Flexible Multimode Fibers without Access to the Distal End. arXiv preprint arXiv:1506.08586. 2015.

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