期刊
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
卷 266, 期 12-13, 页码 2918-2922出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2008.03.181
关键词
silica; defects; fluorine doping; optical fiber; electron spin resonance
The role of fluorine doping in the response to UV pulsed laser and gamma radiation of silica preforms and fibers was studied using electron spin resonance (ESR) spectroscopy. Exposure to radiation mainly generates E' 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. (C) 2008 Elsevier B.V. All rights reserved.
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