Marc Fabert

Centre National de la Recherche Scientifique

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Vincent Couderc

Université de Limoges

Alessandro Tonello

Université de Limoges

S. Wabnitz

Novosibirsk State University

Katarzyna Krupa

Polish Academy of Sciences

G. Millot

Laboratoire Interdisciplinaire Carnot de Bourgogne

Vincent Kermène

Université de Limoges

Agnès Desfarges‐Berthelemot

Université de Limoges

Tigran Mansuryan

Université de Limoges

D. Modotto

University of Brescia

Alioune Niang

University of Maryland, Baltimore

Cooperative Institutions

Centre National de la Recherche Scientifique

217

Université de Limoges

128

XLIM

Coherent (United States)

Université de Bordeaux

Institut Polytechnique de Bordeaux

Laboratoire de l'Intégration du Matériau au Système

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

University of Brescia

Université de Bourgogne

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Reliability of submicron InGaAs/InP DHBT under thermal and electrical stresses

Microelectronics Reliability (2011)

G. A. Koné B. Grandchamp C. Hainaut Marc Fabert Cristell Maneux

Heterojunction bipolar transistor

10.1016/j.microrel.2011.07.073

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Citations (8)

Development of a versatile multiphoton microendoscope for in vivo deep-tissue label-free biomedical imaging

Optics in the Life Sciences (2015)

Pierre Leclerc Guillaume Ducourthial Tigran Mansuryan Marc Fabert Julien Brévier

We report the optimization of a miniaturized multiphoton endomicroscope enabling high resolution label-free in vivo imaging of deep cellular and tissular intrinsic constituents at the output of a very long and flexible custom-designed optical fiber.

10.1364/boda.2015.bt1a.2

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Citations (1)

Development of a real-time flexible multiphoton microendoscope for label-free imaging in a live animal

Scientific Reports (2015)

Guillaume Ducourthial Pierre Leclerc Tigran Mansuryan Marc Fabert Julien Brévier

Abstract We present a two-photon microendoscope capable of in vivo label-free deep-tissue high-resolution fast imaging through a very long optical fiber. First, an advanced light-pulse spectro-temporal shaping device optimally precompensates for linear and nonlinear distortions occurring during propagation within the endoscopic fiber. This enables the delivery of sub-40-fs duration infrared excitation pulses at the output of 5 meters of fiber. Second, the endoscopic fiber is a custom-made double-clad polarization-maintaining photonic crystal fiber specifically designed to optimize the imaging resolution and the intrinsic luminescence backward collection. Third, a miniaturized fiber-scanner of 2.2 mm outer diameter allows simultaneous second harmonic generation (SHG) and two-photon excited autofluorescence (TPEF) imaging at 8 frames per second. This microendoscope’s transverse and axial resolutions amount respectively to 0.8 μm and 12 μm, with a field-of-view as large as 450 μm. This microendoscope’s unprecedented capabilities are validated during label-free imaging, ex vivo on various fixed human tissue samples and in vivo on an anesthetized mouse kidney demonstrating an imaging penetration depth greater than 300 μm below the surface of the organ. The results reported in this manuscript confirm that nonlinear microendoscopy can become a valuable clinical tool for real-time in situ assessment of pathological states.

Two-photon excitation microscopy

Endomicroscopy

10.1038/srep18303

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Citations (127)

Kerr beam self-cleaning in the multimode fiber anomalous dispersion regime

arXiv (Cornell University) (2018)

Y. Leventoux A. Parriaux O. Sidelnikov G. Granger M. Jossent

We experimentally demonstrate Kerr beam self-cleaning in the anomalous dispersion regime of graded-index multimode optical fibers. By using 90 ps duration, highly chirped (2 nm bandwidth at -3dB) optical pulses at 1562 nm, we demonstrate a 2 decades reduction, with respect to previous experiments in the normal dispersion regime, of threshold peak power for beam self-cleaning into the fundamental mode of the fiber, accompanied by more than 65% nonlinear increase of intensity correlation into the fundamental mode. Highly efficient self-selection of the LP11 mode is also observed. Self-cleaned beams remain spatio-temporally stable for more than a decade of variation of the peak pulse power.

Self-focusing

Self-phase modulation

Modal dispersion

10.48550/arxiv.1810.05878

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Citations (3)

Active coherent combining of laser beam arrays by means of phase-intensity mapping in an optimization loop

Optics Express (2015)

David Kabeya Vincent Kermène Marc Fabert Joël Benoist Agnès Desfarges‐Berthelemot

A new approach is proposed for the adaptive phase-locking of a set of parallel laser beams. It is based on an optical conversion of phase differences in the array into an intensity pattern which feeds an optimization algorithm for iterated adjustments of the phase modulators. A numerical analysis and proof of principle experiment support the method and demonstrate its speed.

Intensity

Iterated function

10.1364/oe.23.031059

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Citations (18)

Temporal shaping of high‐voltage picosecond electric pulses for electronic spectroscopy and bioelectric applications

Microwave and Optical Technology Letters (2022)

Sahar Wehbi Nour Tabcheh Alessandro Tonello Rosa Orlacchio Philippe Lévêque

Abstract In this paper, we present the temporal and spectral shaping of kilovolt picosecond electrical pulses obtained by using the linear switching process with femtosecond laser source. The frozen wave generator integrating up to four photoconductive semiconductor switches is activated by varying the optical pulse amplitude and time delay. Electric pulses with rise time and duration as short as 60 and 100 ps, respectively are used to implement a microwave spectroscopy experiment. This optoelectronic device is synchronous with the optical pulses which can be used for optical spectroscopy, after nonlinear frequency conversion. This single‐shot microwave spectroscopy technique was used to characterize the resonances of a passive dielectric resonator. Pulse shaping integrating coherent wave combining is also demonstrated.

Picosecond

10.1002/mop.33547

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Citations (0)

Spatiotemporal Beam Self-cleaning for High-resolution Nonlinear Fluorescence Imaging With Multimode Fiber

Research Square (Research Square) (2021)

Nawell OULD-MOUSSA Tigran Mansuryan Charles‐Henri Hage Marc Fabert Katarzyna Krupa

Abstract Beam self-cleaning (BSC) in graded-index (GRIN) multimode fibers (MMFs) has been recently reported by different research groups. Driven by the interplay between Kerr effect and beam self-imaging, BSC counteracts random mode coupling, and forces laser beams to recover a quasi-single mode profile at the output of GRIN fibers. Here we show that the associated self-induced spatiotemporal reshaping allows for improving the performances of nonlinear fluorescence (NF) microscopy and endoscopy using multimode optical fibers. We experimentally demonstrate that the beam brightness increase, induced by self-cleaning, enables two and three-photon imaging of biological samples with high spatial resolution. Temporal pulse shortening accompanying spatial beam clean-up enhances the output peak power, hence the efficiency of nonlinear imaging. We also show that spatiotemporal supercontinuum (SC) generation is well-suited for large-band NF imaging in visible and infrared domains. We substantiated our findings by multiphoton fluorescence imaging in both microscopy and endoscopy configurations.

Supercontinuum

10.21203/rs.3.rs-544231/v1

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Citations (2)

Investigation of the degradation mechanisms of InP/InGaAs DHBT under bias stress conditions to achieve electrical aging model for circuit design

Microelectronics Reliability (2011)

Sudip Ghosh B. Grandchamp G. A. Koné Marc Fabert Cristell Maneux

Degradation

Transient (computer programming)

10.1016/j.microrel.2011.07.045

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Citations (11)

Vis-IR Optical switching modulation based on the electrically activated phase transition of VO2 thin films

HAL (Le Centre pour la Communication Scientifique Directe) (2010)

Aurelian Crunteanu Marc Fabert Julien Givernaud Vincent Kermène Agnès Desfarges‐Berthelemot

Modulation (music)

Source

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Citations (0)

Intermodal Modulation Instability and Four-Wave Mixing in Graded-Index Few-Mode Fibers

Conference on Lasers and Electro-Optics (2018)

A. Bendahmane R. Dupiol Katarzyna Krupa Alessandro Tonello Julien Fatome

By controlling pump modes injected in the normal dispersion regime of few-mode graded index optical fiber, we investigated intermodal noise-seeded modulation instability and generation of highly-detuned cascaded intermodal four-wave mixing sidebands.

Modulation (music)

Modulation index

Four-wave mixing

Mode (computer interface)

10.1364/cleo_si.2018.sw3k.6

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Citations (0)