Paramagnetic germanium-related centers induced by energetic radiation in optical fibers and preforms
- Autori: Origlio, G; Girard, S; Cannas, M; Ouerdane, Y; Boscaino, R; Boukenter, A
- Anno di pubblicazione: 2009
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Silica, optical fiber, defects, Geermanium doping
- OA Link: http://hdl.handle.net/10447/37233
Abstract
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 paramanetic defect species like GE', Ge(1) 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.