A5003556516- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Particle physics theoretical and experimental studies
- Laser-Matter Interactions and Applications
- Quantum Chromodynamics and Particle Interactions
- Spectroscopy and Laser Applications
- Solid State Laser Technologies
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Glass properties and applications
- Neutrino Physics Research
- Laser Material Processing Techniques
- French Urban and Social Studies
- Advanced Chemical Physics Studies
- Advanced Surface Polishing Techniques
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Laser Design and Applications
Université de Limoges
2016-2025
Centre National de la Recherche Scientifique
2016-2025
XLIM
2016-2025
Centre Intégré Universitaire de Santé et de Services Sociaux du Centre-Sud-de-l'Île-de-Montréal
2024
Centre Intégré Universitaire de Santé et de Services Sociaux du Saguenay–Lac-Saint-Jean
2024
Université de Sherbrooke
2008-2024
Université du Québec à Montréal
2024
Synchrotron soleil
2014-2023
Khulna University
2023
Saitama University
2023
We report on the experimental demonstration of a white-light supercontinuum generation in normally dispersive singlemode air-silica microstructured fiber.We demonstrate that simultaneous excitation microstuctured fiber its normal and anomalous dispersion regimes using fundamental second harmonic signals passively Qswitched microchip laser leads to homogeneous visible range.This pumping scheme allows suppression cascaded Raman effect predominance favor an efficient spectrum broadening induced...
We show that high efficiency stimulated Raman scattering can be obtained using hollow core photonic crystal fiber with the filled a low refractive index nonlinear liquid. This new architecture opens perspectives in development of functions as any kind liquid media now used to implement them, original properties not accessible silica fibers.
We present a photosensitive three-hole microstructured optical fiber specifically designed to improve the refractive index sensitivity of standard Bragg grating (FBG) sensor photowritten in suspended Ge-doped silica core. describe specific photowriting procedure used realize gratings such fiber. then determine their spectral changes material filling holes surrounding The is compared with that FBGs six-hole larger core diameter. demonstrate an improvement by two orders magnitude and reach...
Cold dust grains emission in the FIR/submm is usually expressed as a modified black body law which mass absorption coefficient (MAC), described with temperature- and wavelength-independent emissivity spectral index, beta. However, numerous data from space balloon-born missions recently Herschel Planck show that not well understood, revealed by observed anti-correlation of beta grain temperature. In order to give astronomers necessary interpret observations, we synthesised analogues...
A curvature sensor based on a highly birefringent (Hi-Bi) photonic crystal fiber inserted into Sagnac interferometer is demonstrated. For this purpose, novel Hi-Bi was designed and fabricated. Half of the microstructured region composed by large diameter holes, while other half contained small holes. Because geometry, core shifted from center high birefringence appears in optical fiber. Curvature applied for three different directions range 0.6-5 m(-1). Temperature longitudinal strain also...
A fiber-optic sensor for torsion measurement, based on a two-linearly polarized (LP)-mode operation in ultrahigh birefringent photonic crystal fiber is described. The structure of the presents two large asymmetric holes adjacent to core fiber. When linearly light injected <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</i> - and xmlns:xlink="http://www.w3.org/1999/xlink">y</i> -directions, respectively, separate interferometers can be obtained....
Cumulative CO2 emissions are a robust predictor of mean temperature increase. However, many societal impacts driven by exposure to extreme weather conditions. Here, we show that cumulative can be robustly linked regional changes heat indicator, as well the resulting socioeconomic associated with labour productivity loss in vulnerable economic sectors. We estimate historical and future increases using simulations from eight Earth System Models. Both global intensity spatial pattern evolve...
To model the cold dust emission observed in diffuse interstellar medium, dense molecular clouds or clumps that could eventually form new stars, it is mandatory to know physical and spectroscopic properties of this understand its emission. This work a continuation previous studies aiming at providing astronomers with data realistic cosmic analogues for interpretation observations. Ferromagnesium amorphous silicate were produced mean composition close $\mathrm{Mg_{1-x}Fe_{x}SiO_3}$ x = 0.1,...
The first inscription of long-period gratings in a Ge-free air-silica microstructure fibre with rejection bands situated the telecom wavelength range is reported. are realised by using electric arc technique. Rejected high isolation and very low thermal sensitivity have been obtained.
We have converted the former solar electrical plant THEMIS (French Pyrenees) into an atmospheric Cerenkov detector called CELESTE, which records gamma rays above 30 GeV (7 × 1024 Hz). Here we present first sub-100 detection by a ground-based telescope of gamma-ray source, Crab Nebula, in energy region between satellite measurements and imaging telescopes. At our analysis threshold 60 ± 20 measure rate 6.1 0.8 minute-1. Allowing for 30% systematic uncertainties error on scale yields integral...
The present study is based on a sample of 407 775 single muons and 12 559 muon bundles with zenith angles smaller than 60°, observed in the 12.3m×6m×6m Fréjus proton-decay detector, at depth 4850 hg/cm2. variation vertical intensity given. Using maximum-likelihood method, lateral distribution underground investigated as function multiplicity angle. same method yields true site depth, corrected for all detection effects.Received 5 May 1989DOI:https://doi.org/10.1103/PhysRevD.40.2163©1989...
Very large mode area, active optical fibers with a low high order content in the actively doped core region were designed by removing inner cladding symmetry. The relevance of numerical approach is demonstrated here investigation standard air-silica Large Pitch Fiber, used as reference. A detailed study all-solid structures also performed. Finally, we propose new kinds geometry for 50 μm core, microstructured enabling robust singlemode laser emission from 400 nm to 2200 nm.
The infrared absorption spectra of two ionic liquids with bis(trifluoromethanesulfonyl)imide (TFSI) as an anion and ammonium different alkyl chains cations are reported a function temperature. Using the comparison ab initio calculations infrared-active intramolecular vibrations, experimental lines were ascribed to various ions composing liquids. In liquid state samples, both conformers TFSI ion present. solid state, however, survive in N-trimethyl-N-propylammonium (TMPA-TFSI), while only...
A wealth of data from the Herschel and Planck satellites now ALMA, revealing cold dust thermal emission, is available for astronomical environments ranging interstellar clouds, clumps, circumstellar envelops, protoplanetary disks. The interpretation these observations relies on understanding modeling emission knowledge optical properties. aim this work to provide astronomers with a set spectroscopic realistic analogues that can be used interpret observations. Glassy silicates mean...