Paramagnetic germanium-related centers induced by energetic radiation in optical fibers and preforms

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

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

We investigated the creation processes of Ge-related paramagnetic point defects in silica fibers and preforms, doped with different amounts of germanium, and X-ray irradiated at several radiation doses. Different paramagnetic defect species, like GeE0, Ge(1) and Ge(2), were revealed by electron paramagnetic resonance measurements and their concentration was studied as a function of the irradiation dose. The comparison with the optical absorption spectra points out the main role of Ge(1) on the optical transmission loss of fibers in the UV region.

Mots clés: Optical fibers; Optical spectroscopy; Defects; Absorption; Silica; Electron spin resonance

Domaines: Optique [physics.optics]

G. Origlio, Sébastien Girard, Marco Cannas, Y. Ouerdane, R. Boscaino, et al.. Paramagnetic germanium-related centers induced by energetic radiation in optical fibers and preforms. Journal of Non-Crystalline Solids, 2009, 355, pp.1054-1056. ⟨10.1016/j.jnoncrysol.2008.11.033⟩. ⟨ujm-00394025⟩