0000000000361862

AUTHOR

Yi-fan Niu

showing 2 related works from this author

Synthesis and characterization of chalcogenide glasses from the system Ga-Ge-Sb-S and preparation of a single-mode fiber at 1.55 μm

2008

International audience; The aim of this work is to study different compositions in the Ga-Ge-Sb-S system for the definition of two compositions compatible with the elaboration of a single-mode fiber at the 1.55 μm telecom wavelength. The variations of the glass transition temperature (Tg), the dilatation coefficient (α) and the refractive index (n) have been studied for two glasses series: GaxGe25−xSb10S65 (series 1), Ga5Ge25−xSb10S60+x (series 2). This study has lead to the choice of the Ga4Ge21Sb10S65 composition as clad glass for the preparation of the single-mode fiber and Ga5Ge20Sb10S65 composition as the core. The discrepancies for the studied parameters between the core and clad comp…

A. ChalcogenidesMaterials scienceChalcogenideA. GlassesAnalytical chemistryMineralogy02 engineering and technology01 natural sciences010309 opticschemistry.chemical_compound0103 physical sciencesGeneral Materials ScienceFiberD. Optical propertiesMechanical EngineeringSingle-mode optical fiber[CHIM.MATE]Chemical Sciences/Material chemistryComposition (combinatorics)021001 nanoscience & nanotechnologyCondensed Matter PhysicsCore (optical fiber)WavelengthA. Optical materialschemistryMechanics of Materials[ CHIM.MATE ] Chemical Sciences/Material chemistry0210 nano-technologyGlass transitionRefractive index
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Aqueous Corrosion of the GeSe4 Chalcogenide Glass: Surface Properties and Corrosion Mechanism

2009

International audience; The aqueous corrosion behavior of the GeSe4 glass composition has been studied over time under various conditions (temperature and pH). The evolution of the surface topography by atomic force microscopy and properties such as surface hardness and reduced modulus, as well as the optical transmission in the 1-16 μm window, have been measured as a function of time spent in the corrosive solution. It was found that even if the glass reacts at room temperature, its optical transparency was barely affected. Nevertheless, the durability of GeSe4 was found to be drastically affected by an increase of both temperature and pH. Furthermore, pure selenium nanoparticles were form…

010302 applied physicsReaction mechanismOptical fiberMaterials scienceMetallurgyHexagonal phaseNanoparticleChalcogenide glass02 engineering and technologyActivation energy[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnology01 natural sciencesHardnesslaw.inventionCorrosionChemical engineeringlaw[ CHIM.MATE ] Chemical Sciences/Material chemistry0103 physical sciencesMaterials ChemistryCeramics and Composites0210 nano-technology
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