Radiation effects of 14 MeV neutrons on germanosilicate and phosphorus-doped multimode optical fibers

J. Bisutti (1, 2) , Sébastien Girard (2) , J. Baggio (2)

1 LHC - Laboratoire Hubert Curien
2 DCRE CEA - Département de Conception et Réalisation des Experimentations, CEA-DIF

We report the radiation-induced effects of 14 MeV neutrons on the transmission properties (300–900 nm) of germanosilicate (Ge) and phosphorus (P)-doped multimode optical fibers. We showed that all optical fibers, especially those containing P in their core or cladding, exhibit strong radiation-induced attenuation levels. Our results suggest that phosphorus- oxygen-hole centers govern the radiative response of P-codoped fibers in the visible to near-infrared range. Germanosilicate P-free fibers exhibit an induced attenuation decreasing from the ultraviolet to the near-infrared wavelengths that can be associated with GeX, Ge(1) and Ge-NBOH centers.

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

Domaines: Optique [physics.optics]

J. Bisutti, Sébastien Girard, J. Baggio. Radiation effects of 14 MeV neutrons on germanosilicate and phosphorus-doped multimode optical fibers. Journal of Non-Crystalline Solids, 2007, 353, pp.461-465. ⟨ujm-00431852⟩