X-ray irradiation effects on fluorine-doped germanosilicate optical fibers

Abstract : 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) and Eʹ centers by EPR. No relevant differences are found in the RIA of the three fibers, as well as in the induced concentrations of Ge(1) and Ge(2) and in the decrease of the GLPC, showing minor relevance of changing the drawing conditions. We found that fluorine codoping does not affect the RIA and that, unexpectedly, the fluorine co-doped zones of the OFs show an enhanced photoluminescence of the radiation induced NBOHC enabling to suggest the presence of both Si and Ge variants. Moreover, an overall increase of the radiation induced Eʹ(Ge) centers is registered in relation to the presence of fluorine showing that this codopant has relevant effects.
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Article dans une revue
Optical Materials Express, OSA pub, 2014, 4 (8), pp.1683-1695. 〈10.1364/OME.4.001683〉
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https://hal-ujm.archives-ouvertes.fr/ujm-01037856
Contributeur : Sylvain Girard <>
Soumis le : mardi 22 juillet 2014 - 22:57:48
Dernière modification le : mardi 30 octobre 2018 - 17:00:02

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Diego Di Francesca, Aziz Boukenter, S. Agnello, Sylvain Girard, A. Alessi, et al.. X-ray irradiation effects on fluorine-doped germanosilicate optical fibers. Optical Materials Express, OSA pub, 2014, 4 (8), pp.1683-1695. 〈10.1364/OME.4.001683〉. 〈ujm-01037856〉

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