A5083070091- Glass properties and applications
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Material Dynamics and Properties
- Luminescence Properties of Advanced Materials
- Mesoporous Materials and Catalysis
- Building materials and conservation
- Cultural Heritage Materials Analysis
- Advanced Fiber Laser Technologies
- Clay minerals and soil interactions
- Mineralogy and Gemology Studies
- Advanced Fiber Optic Sensors
- Ferroelectric and Piezoelectric Materials
- Nuclear materials and radiation effects
- Catalysis and Oxidation Reactions
- Solid State Laser Technologies
- Chemical Synthesis and Characterization
- Zeolite Catalysis and Synthesis
- Laser Material Processing Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Photonic and Optical Devices
- Theoretical and Computational Physics
- Drilling and Well Engineering
- Silicon Nanostructures and Photoluminescence
Surface du Verre et Interfaces
2015-2024
Saint-Gobain (France)
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Saint-Gobain Recherche Paris
2015-2024
Prysmian Group (Italy)
2020
Université Paris-Panthéon-Assas
2020
Prysmian Group (United States)
2012
Itasca Consultants (France)
2011
We demonstrate for the first time a radiation-resistant Erbium-Doped Fiber exhibiting performances that can fill requirements of Amplifiers space applications. This is based on an Aluminum co-doping atom reduction enabled by Nanoparticules Doping-Process. For this purpose, we developed several fibers containing very different erbium and aluminum concentrations, tested them in same optical amplifier configuration. work allows to bring fore highly radiation resistant Erbium-doped pure silica...
Ytterbium doped fiber lasers are known to be impacted by the creation of color centers during lasing so called photodarkening. This defect was investigated in a spectroscopic point view, showing presence thulium traces (ppb) ytterbium fiber. Moreover, this contamination exhibit luminescence UV range under 976 nm excitation ytterbium-doped In adding more an it shown that strongly impact defects process, involved
Manufacture fiber amplifiers and lasers in a versatile cost effective way while controlling rare-earths chemical environment becomes real technology differentiator. A MCVD compatible Nanoparticle Doping Process has been developed to master with higher accuracy rare earth amplifier ytterbium laser fibers. Improved doped erbium fibers C-band gain shape were obtained much less aluminum content unprecedented low background attenuation losses. This process should better show its merits high power...
A new theoretical framework is proposed to explain the dose and dose-rate dependence of radiation-induced absorption in optical fibers. first-order dispersive kinetics model used simulate growth density color centers during an irradiation. This succeeds explaining enhanced low rate sensitivity observed certain kinds erbium-doped fiber provides some insight into physical reasons behind this sensitivity.
We report on the photo-thermal activation of dielectric loaded plasmonic switches comprised gold nanoparticle-doped polymer deposited onto a film. The rely multi-mode interferometer design and are fabricated by electron beam lithography applied to positive resin doped with nanoparticles at volume ratio 0.52%. A cross-bar switching is obtained telecom wavelengths pumping devices visible having frequency within localized surface plasmon resonance band embedded nanoparticles. By comparing...
Ever demanding network implementations brought new requirements to be addressed offer cost effective and power efficient solutions with smaller footprints. This general trend together the constant need improve L-band optical amplification efficiency account for renewed interest on highly doped Erbium fibers. fiber amplifiers (EDFAs) performance degradation Er<sup>3+</sup> concentration increase has extensively been studied1 is attributed additional losses due energy transfers between...
Abstract We compared the impact of alumina doping on structure Al 2 O 3 –SiO amorphous thin films and bulk glasses using Raman spectroscopy x‐ray diffraction. In both glasses, addition is accompanied by an increase in mean Si–O–T angle evolution ring statistics with a decrease proportion small rings. evidenced structural differences between sputtered fused glasses. Sputtered are about 6%–7% denser than their equivalent This difference mainly due to change formation rings within films. These...
Abstract We study the diffusive interaction between soda‐lime glass substrates and sputtered aluminum‐doped silica thin films at 650°C, temperature of commercial shaping or tempering. A first rapid migration alkali ions from substrate to film has been described in a companion paper ( J Am Ceram Soc . 2018;101:1516). Using same samples as 2018;101:1516), we focus here on later interactions, when layer is consumed by resulting interactions. Secondary Ion Mass Spectroscopy profilometry, show...
Erbium-Doped Fiber Amplifiers can present holes in spectral gain Wavelength Division Multiplexing operation. The origin of this inhomogeneous saturation behavior is still a subject controversy. In paper we both an experimental methods and gain's model. Our method allow us to measure the first homogeneous linewidth 1.5 $\mu$m erbium emission with hole burning consistently other measurement literature model explains differences observed between GSHB methods.
Abstract Interdiffusion processes between aluminum enriched PVD ‐sputtered silica thin films and industrial float soda‐lime silicate glass substrates are quantitatively studied using SIMS analysis. Heat treatments performed at temperatures close or above the transition temperature of glass. Aluminum doping film is shown to strongly increase migration alkali from substrate film. In particular final content in exhibits a linear scaling with concentration. An interdiffusion process evidenced...
We report a method to prepare patterned mesoporous silica-based films with fine control of the pore sizes and porous fraction by combining sol–gel approach an alkali ion post-treatment. The strategy involves mesostructure reconstruction surfactant (cetyltrimethylammonium bromide or F127)-templated silica metal diffusion into inorganic matrix at 450 °C. Coatings pores ranged from 2 100 nm; gradients volumes as well two-dimensional structures were obtained optimizing alkali-ion-assisted...
Soda–lime–silica is a glassy system of strong industrial interest. In order to characterize its liquid state properties, we performed molecular dynamics simulations employing an aspherical ion model that includes atomic polarization and deformation effects. They allowed us study the structure diffusion properties at temperatures ranging from 1400 K 3000 K. We show Na+ Ca2+ ions adopt different structural organization within silica network, with having greater affinity for non-bridging...
Diffusion-driven coarsening of droplets is a classical subject in statistical physics, yet kinetics confined systems have received little attention. We report here on the thin (50–200 nm) films phase-separated barium borosilicate glasses. In this ultra-confined geometry where at most one droplet observed within film thickness, grow like power-law time with an exponent about 0.17 significantly smaller than that Ostwald ripening (1/3) characteristic bulk coarsening. complement these...
Abstract Thermal properties of aqueous alkali silicates have been investigated to establish a fundamental understanding the structural state silicate network and its impact on intumescence, up 450°C. Foaming behavior is dependent upon type ion (Na, K, Li) as well composition evidenced from combination tools involving thermogravimetric analysis, nuclear magnetic resonance, X‐ray diffraction. Na show extensive foaming, Li‐silicates do not foam, whereas K‐silicates exhibit an intermediate...
Abstract Glass manufacturing processes are prone to induce local fluctuations of the glass properties, which Raman spectroscopy is highly sensitive. In this work, imaging used investigate homogeneity response at surface casted aluminosilicate pieces. Samples were probed constant focus depth across 7 × cm 2 surfaces using 500 μm spatial steps, resulting in unusually large and detailed images. We show that extent modification small scanned area information mostly carried by representation...