Influence of the drawing process on the defect generation in multistep-index germanium-doped optical fibers
2009; Optica Publishing Group; Volume: 34; Issue: 15 Linguagem: Inglês
10.1364/ol.34.002282
ISSN1539-4794
AutoresG. Origlio, M. Cannas, Sylvain Girard, R. Boscaino, A. Boukenter, Y. Ouerdane,
Tópico(s)Photonic and Optical Devices
ResumoVariation of germanium lone pair center (GLPC) concentration in germanosilicate multistep-index optical fibers and preforms was studied using confocal microscopy luminescence technique. The experimental results provide evidence that in the central core region ([Ge] approximately 11 wt.%) of our specific canonical samples the ratio [GLPC]/[Ge] is five times larger in fiber than in preforms. The relative influence of the glass composition and of the drawing process on the generation efficiency of the GLPC defects that drive the glass photosensitivity is discussed. The radial distribution of these defects suggests a possible enhancement of the defect creation related to the internal stress of the fiber core.
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