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

2009; Elsevier BV; Volume: 355; Issue: 18-21 Linguagem: Inglês

10.1016/j.jnoncrysol.2008.11.035

1873-4812

S. Girard, C. Marcandella, G. Origlio, Y. Ouerdane, A. Boukenter, Jean-Pierre Meunier,

Luminescence Properties of Advanced Materials

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.