Real-time two-dimensional imaging in scattering media by use of a femtosecond Cr^4+:forsterite laser

Abraham, Emmanuel; Bordenave, E.; Tsurumachi, Noriaki; Jonusauskas, Gediminas; Oberlé, J.; Rullière, C.; Mito, Akihiro

doi:10.1364/ol.25.000929

Cited by 25 publications

(7 citation statements)

References 11 publications

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“…By switching the photon counter with a CCD camera, a transient image is detected ( Fig. 1c) that shows the spatial resolution of our setup (∼ 22.6 lp mm −1 in x and ∼ 11.3 lp mm −1 in y at 0.5 contrast), which is comparable to previous publications 6,24,26,29 . The final resolution is obtained by reducing the aperture of the FF to < 1 mm, until the same (isotropic) resolution of ∼ 11.3 lp mm −1 is obtained in both directions.…”

Section: Methodssupporting

confidence: 88%

“…To obtain the same resolving power in both the x and y directions, the aperture of a Fourier filter (FF) can be reduced to act as a tunable isotropic wavevector filter. Several alternative upconverting configurations have been reported in the literature regarding full-frame imaging applications 6,[22][23][24][25][26][27][28][29] , most of which employ a non-linear crystal in the Fourier plane of the imaging optics rather than in the image plane. Both configurations present different advantages, and the preference for their adoption depends on the specific application.…”

Section: Methodsmentioning

confidence: 99%

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Spatio-temporal visualization of light transport in complex photonic structures

et al. 2016

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Spatio-temporal imaging of light propagation is very important in photonics because it provides the most direct tool available to study the interaction between light and its host environment. Sub-ps time resolution is needed to investigate the fine and complex structural features that characterize disordered and heterogeneous structures, which are responsible for a rich array of transport physics that have not yet been fully explored. A newly developed wide-field imaging system enables us to present a spatio-temporal study on light transport in various disordered media, revealing properties that could not be properly assessed using standard techniques. By extending our investigation to an almost transparent membrane, a configuration that has been difficult to characterize until now, we unveil the peculiar physics exhibited by such thin scattering systems with transport features that go beyond mainstream diffusion modeling, despite the occurrence of multiple scattering.

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Section: Methodssupporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Spatio-temporal visualization of light transport in complex photonic structures

et al. 2016

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“…Since multiply scattered photons usually have longer path lengths than weakly scattered photons, they can be excluded by time gating. [1][2][3][4][5] Polarization gating can be used as an alternative method for extracting the ballistic and quasiballistic components because weakly scattered light preserves its original polarization better than multiply scattered light. [6][7][8][9][10] Polarization propagation in biological tissues is a complicated process that is fundamental to tissue optics.…”

Section: Introductionmentioning

confidence: 99%

Polarized light propagation through scattering media: time-resolved Monte Carlo simulations and experiments

Wang

Sun

et al. 2003

J. Biomed. Opt.

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Abstract.A study of polarized light transmitted through randomly scattering media of a polystyrene-microsphere solution is described. Temporal profiles of the Stokes vectors and the degree of polarization are measured experimentally and calculated theoretically based on a Monte Carlo technique. The experimental results match the theoretical results well, which demonstrates that the time-resolved Monte Carlo technique is a powerful tool that can contribute to the understanding of polarization propagation in biological tissue. Analysis based on the Stokes-Mueller formalism and the Mie theory shows that the first scattering event determines the major spatial patterns of the transmitted Stokes vectors. When an area detected at the output surface of a turbid medium is circularly symmetrical about the incident beam, the temporal profile of the transmitted light is independent of the incident polarization state. A linear relationship between the average order of the scatters and the light propagation time can be used to explain the exponential decay of the degree of polarization of transmitted light.

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“…This upconversion time gating is primarily explored for studying transient phenomena like fluorescence characterization [210]- [212] and ultrafast time-resolved spectroscopy [54], [124], [165], [213], and been used for detecting objects embedded in scattering media [201], [214] and even for temporal characterization at single-photon level [215], [216]. There are only a few reported results, where time gating is combined with spatial imaging for characterizing transient phenomena of a 2-D object [136], [217]. Further study in this direction will open up a vast research and application field, where one can envision wide FoV and spectrally resolved transient infrared imaging [198].…”

Section: Discussionmentioning

confidence: 99%

Parametric upconversion imaging and its applications

Barh¹,

Rodrigo²,

Meng³

et al. 2019

Adv. Opt. Photon.

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This article provides an extensive survey of nonlinear parametric upconversion infrared (IR) imaging, starting from its origin to date. Upconversion imaging is a successful innovative technique for IR imaging in terms of sensitivity, speed, and noise performance. In this approach, the IR image is frequency upconverted to form a visible/near-IR image through parametric three-wave mixing followed by detection using a silicon-based detector or camera. In 1968 (50 years back), J. E. Midwinter first demonstrated upconversion imaging from shortwave-IR (1.6 μm) to visible (484 nm) wavelength using a bulk lithium niobate crystal. This technique quickly gained interest, and several other groups demonstrated upconversion imaging further into the mid-and far-IR with significantly improved quantum efficiency. Although a few excellent reviews on upconversion imaging were published in the early 1970's, the rapid progress in recent years merits an updated comprehensive review. The topic includes linear imaging, nonlinear optics, and laser science, and has shown diverse applications. The scope of this article is to provide an in-depth knowledge of upconversion imaging theory. An overview of different phase matching conditions for the parametric process and the sensitivity of the upconversion detection system are discussed. Furthermore, different design considerations and optimization schemes are outlined for application-specific upconversion imaging. The article comprises a historical perspective of the technique, its most recent technological advances, specific outstanding issues, and some cutting-edge applications of upconversion in IR imaging.

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Real-time two-dimensional imaging in scattering media by use of a femtosecond Cr^4+:forsterite laser

Cited by 25 publications

References 11 publications

Spatio-temporal visualization of light transport in complex photonic structures

Spatio-temporal visualization of light transport in complex photonic structures

Polarized light propagation through scattering media: time-resolved Monte Carlo simulations and experiments

Parametric upconversion imaging and its applications

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