Search results for "Fiber design and fabrication"

showing 3 items of 3 documents

Phosphorous doping and drawing effects on the Raman spectroscopic properties of O=P bond in silica-based fiber and preform.

2012

International audience; We report an experimental study of the doping and drawing effects on the Raman activities of phosphorus (P)-doped silica-based optical fiber and its related preform. Our data reveal a high sensitivity level in the full width at half maximum value of the 1330 cm−1 (O = P) Raman band to the P-doping level. Its increase with the P doping level does not clash with an increase in the disorder of the O = P surrendering matrix. In addition, we observe that in the central core region of the sample (higher doping level), the drawing process decreases the relative band amplitude. We tentatively suggest that this phenomenon is due to the change in the first derivate of the bond…

(060.2310) Fiber optics; (300.6450) Spectroscopy Raman; (160.2750) Glass and other amorphous materials; (060.2280) Fiber design and fabrication; (060.2290) Fiber materials.inorganic chemicalsMaterials scienceOptical fiberAnalytical chemistryChemical vapor depositionlaw.inventionCondensed Matter::Materials Sciencesymbols.namesakeOpticslawPolarizabilityCondensed Matter::SuperconductivityFiber[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]business.industryDopingtechnology industry and agricultureFiber optics Spectroscopy Raman Glass and other amorphous materials Fiber design and fabrication Fiber materialsElectronic Optical and Magnetic MaterialsFull width at half maximumsymbolsbusinessRaman spectroscopyhuman activitiesRaman scattering
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All-fiber processing of terahertz-bandwidth signals based on cascaded tapered fibers

2013

Tapered single-mode fibers are employed to perform dynamic pulse shaping in a bandwidth of several terahertz. The transfer function of cascaded biconical tapers is controlled by introducing a phase shift into one of them through mechanical stretching. It is a simple and low-cost technique with potential to process signals with bandwidths as large as those allocated by standard optical fiber while introducing little degradation. Femtosecond pulses are shaped to prove the concept. (C) 2013 Optical Society of America

Femtosecond pulse shapingMaterials scienceOptical fiberbusiness.industryTerahertz radiationBandwidth (signal processing)Physics::OpticsNonlinear opticsFiber measurementsTransfer functionPulse shapingAtomic and Molecular Physics and Opticslaw.inventionOpticslawTEORIA DE LA SEÑAL Y COMUNICACIONESFemtosecondFiber design and fabricationDispersion.businessOptics Letters
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X-ray irradiation effects on fluorine-doped germanosilicate optical fibers

2014

International audience; We report an experimental investigation on the effects of fluorine codoping on the radiation response of Ge-doped Optical Fibers (OFs) obtained by three different drawing conditions. The OFs were irradiated with 10 keV X-rays up to 300 Mrad and studied by online Radiation-Induced-Attenuation (RIA) measurements. Confocal Micro- Luminescence (CML) and Electron Paramagnetic Resonance (EPR) were also employed to investigate the permanent radiation-induced-defects. The variation of the Germanium-Lone-Pair-Center (GLPC) and Non-Bridging- Oxygen-Hole-Centers (NBOHC) concentration with the radiation dose is investigated by CML, whereas the ones of the induced Ge(1), Ge(2) an…

Spectroscopy Fluorescence and luminescencePhotoluminescenceMaterials sciencebusiness.industryDopingSettore FIS/01 - Fisica SperimentaleAnalytical chemistrychemistry.chemical_elementChemical vapor depositionFiber opticElectronic Optical and Magnetic Materialslaw.inventionFiber materials.[SPI]Engineering Sciences [physics]OpticschemistrylawGlass and other amorphous materialHalogenFluorineFiber design and fabricationIrradiationElectron paramagnetic resonanceLuminescencebusiness
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