Micro-Raman investigation of X or gamma irradiated Ge doped fibers

A. Alessi (1) , Sébastien Girard (2) , C. Marcandella (2) , Marco Cannas (3) , A. Boukenter (1) , Y. Ouerdane (1)

1 LHC - Laboratoire Hubert Curien
2 DAM - Direction des Applications Militaires
3 Università degli studi di Palermo - University of Palermo

Micro-Raman spectra have been recorded on Ge doped optical fibers before and after 10 keV-X or c-ray irradiation up to doses of 1 MGy (X-ray) or 7.8 MGy (-ray). Our data provide evidence that, at such dose levels, the glass matrix is not modified in a detectable way. We observed that varying the Ge doping levels from 0 to about 11 wt.%, X or radiation sensitivity of the overall matrix remains unchanged. Such results are observed for fibers obtained with drawing conditions within the usual range used for the fabrication of specialty fibers as radiation-tolerant waveguides. Our data support the potentiality of fiberbased sensors using glass properties, e.g. Raman scattering, for applications in harsh environments as those encountered in nuclear power plants.

Mots clés: Optical fiber; Drawing condition; Radiation effects; Raman spectroscopy

Domaines: Optique [physics.optics]

A. Alessi, Sébastien Girard, C. Marcandella, Marco Cannas, A. Boukenter, et al.. Micro-Raman investigation of X or gamma irradiated Ge doped fibers. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2011, 269, pp.1346-1349. ⟨10.1016/j.nimb.2011.03.021⟩. ⟨ujm-00590671⟩