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Title: Gamma and x-ray irradiation effects on different Ge and Ge/F doped optical fibers

We performed electron paramagnetic resonance (EPR) measurements on γ and X ray irradiated Ge doped and Ge/F co-doped optical fibers. We considered three different drawing conditions (speed and tension), and for each type of drawing, we studied Ge and Ge/F doped samples having Ge doping level above 4% by weight. The EPR data recorded for the γ ray irradiated fibers confirm that all the samples exhibit a very close radiation response regardless of the drawing conditions corresponding to values used for the production of specialty fibers. Furthermore, as for the X irradiated materials, in the γ ray irradiated F co-doped fibers, we observed that the Ge(1) and the Ge(2) defects generation is unchanged, whereas it was enhanced for the E'Ge. In the various fibers, the comparison of the γ and X-ray induced concentrations of these kinds of Ge related defects indicates that the two irradiations induce similar effects regardless of the different employed dose rates and sources. Confocal microscopy luminescence results show that the starting content of the Germanium Lone Pair Center (GLPC) is neither strongly affected by the Ge content nor by the drawing conditions, and we consider the similarity of the GLPC content as key factor in determiningmore » many of the above reported similarities.« less
Authors:
; ; ; ;  [1] ;  [1] ;  [2] ; ;  [3] ; ;  [4] ; ;  [5]
  1. Laboratoire H. Curien, UMR CNRS 5516, Université de Lyon, 18 rue du Pr. Benoît Lauras, 42000 Saint-Etienne (France)
  2. (Slovenia)
  3. Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270 Ajdovscina (Slovenia)
  4. Dipartimento di Fisica e Chimica, Università di Palermo, I-90123 Palermo (Italy)
  5. CEA, DAM, DIF, F-91297 Arpajon (France)
Publication Date:
OSTI Identifier:
22494815
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONCENTRATION RATIO; DEFECTS; DOPED MATERIALS; DOSE RATES; ELECTRON SPIN RESONANCE; FLUORINE; GERMANIUM; LUMINESCENCE; MICROSCOPY; OPTICAL FIBERS; RADIATION EFFECTS; X RADIATION