Irradiation induced defects in fluorine doped silica

G. Origlio (1, 2) , A. Boukenter (1) , Sébastien Girard (3) , N. Richard (3) , Marco Cannas (2) , R. Boscaino (2) , Y. Ouerdane (1)

1 LHC - Laboratoire Hubert Curien
2 DIPARTIMENTO DI SCIENZE FISICHE ED ASTRONOMICHE, UNIVERSITà DI PALERMO - Dipartimento di Scienze Fisiche ed Astronomiche, Università di Palermo
3 DCRE CEA - Département de Conception et Réalisation des Experimentations, CEA-DIF

The role of fluorine doping in the response to UV pulsed laser and c radiation of silica preforms and fibers was studied using electron spin resonance (ESR) spectroscopy. Exposure to radiation mainly generates E0 centers, with the same effectiveness in fibers and in preforms. The E'concentration in F-doped silica fibers is found to increase with UV energy fluence till a saturation value, consistently with a precursor conversion process. These results show the fluorine role in reducing the strained Si–O bonds thus improving the radiation hardness of silica, also after drawing process.

Keywords: Silica; Defects; Fluorine doping; Optical fiber; Electron spin resonance

Domains: Optics [physics.optics]

G. Origlio, A. Boukenter, Sébastien Girard, N. Richard, Marco Cannas, et al.. Irradiation induced defects in fluorine doped silica. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2008, 266, pp.2918-2922. ⟨10.1016/j.nimb.2008.03.181⟩. ⟨ujm-00297558⟩