Search results for " radiation induced absorption"

showing 4 items of 4 documents

Etude spectroscopique de fibres durcies pour un environnement radiatif sévère

2013

Les nouveaux environnements radiatifs, comme LMJ, ITER, ILE/ELI, HiPER, réacteurs nucléaires des générations III+ et IV, nécessitent le développement de nouveaux composants pour le transport et le traitement des signaux. A cause de l’impossibilité d’utiliser les composants électroniques, la recherche est orientée vers les composants à fibres optiques comme vecteur d’information et aussi comme élément de diagnostic. Ils présentent de nombreux avantages, comme leur relative immunité électromagnétique, faible pois, large bande passante, mais les rayonnements gamma et les neutrons dégradent leur transmission. La dégradation dépend principalement de la composition de la fibre. Ainsi, il a été mo…

optical fiber radiation induced absorption silica point defect electron spin resonance
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Radiation effects on antimonium-doped Yb-fibers

2013

optical fiber radiation induced absorption photoluminescence
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Pulsed X‐Ray Radiation Responses of Solarization‐Resistant Optical Fibers

2018

International audience; The transient radiation‐induced attenuation (RIA) of two different versions of pure‐silica‐core (PSC) multimode optical fibers (so‐called “solarization‐resistant” fibers) exposed to nanosecond 1 MeV X‐ray pulses are investigated. On‐line RIA spectra measurements at both room temperature (RT) and liquid nitrogen temperatures (LNT) in the range 1–3.5 eV are performed. Following the RIA kinetics, the properties of the metastable defects that are bleached just after the pulse are discussed. The spectral decomposition of the RIA is performed using known Gaussian bands associated to point defects absorbing in this spectral range. For both fiber types, the generation and th…

Optical fiberMaterials science02 engineering and technologyComputer Science::Human-Computer InteractionRadiation01 natural scienceslaw.invention[SPI]Engineering Sciences [physics]law0103 physical sciencesMaterials ChemistryElectrical and Electronic Engineering[PHYS]Physics [physics]010308 nuclear & particles physicsbusiness.industryX-raySurfaces and Interfaces021001 nanoscience & nanotechnologyCondensed Matter PhysicsSolarisationCrystallographic defectSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialsoptical fiber silica point defects radiation induced absorption X-ray[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicOptoelectronics0210 nano-technologybusiness
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Radiation hardening of FBG in harsh environments

2014

International audience; The difficulties encountered in the implementation of a temperature or strain sensor based on Fiber Bragg Grating in a harsh radiative environment are introduced. We present the choices made to select both a radiation-resistant fiber in terms of transmission and also the grating inscription conditions necessary to write radiation tolerant FBGs in such fibers with a femto-second laser. The response of different classes of gratings was also studied under radiation at high doses (>1MGy). The comparison between F- and Ge-doped fibers was highlighted.

PHOSFOSMaterials scienceOptical fiberbusiness.industryOptical fiber Fiber Bragg Grating radiation induced absorption silicaPhysics::OpticsGratingLong-period fiber gratinglaw.invention[SPI]Engineering Sciences [physics]OpticsFiber Bragg gratingFiber optic sensorlawOptoelectronicsbusinessPlastic optical fiberPhotonic-crystal fiber
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