Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 355, Issue 18-21, Pages 1054-1056Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2008.11.033
Keywords
Optical fibers; Optical spectroscopy; Defects; Absorption; Silica; Electron spin resonance
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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. (C) 2009 Elsevier B.V. All rights reserved.
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