Radiation-Induced-Defects Localization in Single-Mode Optical Fibers

Sébastien Girard (1) , A. Boukenter (2) , Y. Ouerdane (2) , J.-P. Meunier (2)

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

We studied the defects at the origins of the permanent radiation-induced attenuation in four g-rays irradiated single-mode germanosilicate optical fibers (~1 MeV; 1.2 kGy; 0.3 Gy/s) in the spectral range 400 - 1700 nm. We determined the wavelength dependence of the following cladding codopant influences: germanium (0.3 %), phosphorus (0.3 %), fluorine (0.3 %) on the germanosilicate (13 %) fiber radiation responses. We identified some of the different color centers produced by g-rays and we evaluated their localization in the fiber cross-section through the determination of the radial distribution of the radiation-induced absorption at 633 nm. We also evidenced the strong interactions between these three codopants. In particular, our results showed that the properties of the phosphorus-related color centers, which mainly determine the fiber infrared radiation sensitivity, are strongly influenced by the germanium- and fluorine-codoping.

Keywords: Color centers; absorption spectra; Irradiation effects; Optical fibers

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Sébastien Girard, A. Boukenter, Y. Ouerdane, J.-P. Meunier. Radiation-Induced-Defects Localization in Single-Mode Optical Fibers. Materials Science Forum, 2005, 480-481, pp.329-332. ⟨ujm-00369252⟩