Radiation-induced defects in fluorine-doped silica-based optical fibers: Influence of a pre-loading with H2

Sébastien Girard (1) , C. Marcandella (1) , G. Origlio (2, 3) , Y. Ouerdane (2) , A. Boukenter (2) , J.-P. Meunier (2)

1 DCRE CEA - Département de Conception et Réalisation des Experimentations, CEA-DIF
2 LHC - Laboratoire Hubert Curien
3 Università degli studi di Palermo - University of Palermo

We investigated the effects of 10-keV X-ray radiation on the transmission properties of F-doped optical fibers in the 200–850 nm range of wavelengths (1.5–6 eV). We also studied the influence of pre-loading this kind of fibers with hydrogen on its radiation sensitivity. Our results showed that, for our experimental conditions (pre-treatment with H2 several months before irradiation with diffusion of all the H2 out the fiber core and cladding before X-ray exposure), this pre-treatment increases the radiation-induced attenuation in the ultraviolet part (200–300 nm) of the spectrum. A previous H2-loading has no influence at greater wavelengths. The nature of the radiation-induced point defects is discussed from the decomposition analysis of the attenuation spectra with Gaussian bands.

Mots clés: Optical fibers; Radiation effects; Optical spectroscopy; Absorption

Domaines: Optique [physics.optics]

Sébastien Girard, C. Marcandella, G. Origlio, Y. Ouerdane, A. Boukenter, et al.. Radiation-induced defects in fluorine-doped silica-based optical fibers: Influence of a pre-loading with H2. Journal of Non-Crystalline Solids, 2009, 355, pp.1089-1091. ⟨10.1016/j.jnoncrysol.2008.11.035⟩. ⟨ujm-00394030⟩