Spatial distributions of NBOHCs in an electron and gamma-ray irradiated germanosilicate optical fiber

Imène Reghioua (1) , Aziz Boukenter (1) , Antonino Alessi (1) , Mattia Fanetti (2) , Diego Di Francesca (1) , Mélanie Raine (3) , Layla Martin-Samos (2) , Nicolas Richard (3) , Y. Ouerdane (1) , Sylvain Girard (1)

1 LHC - Laboratoire Hubert Curien
2 University of Nova Gorica
3 DAM/DIF - DAM Île-de-France

The spatial distributions of emitting point defects are characterized by Confocal-Micro luminescence (CML) spectroscopy in the transverse cross-sections of a 4-steps Ge-doped multimode optical fiber irradiated with either -rays or electrons. The measured cartographies of the Non-Bridging Oxygen Hole Centers (NBOHCs), under an excitation at 633 nm, notably differ between the fiber samples irradiated with electrons (~100 MGy) and those exposed to γ-rays (9 MGy). Additional cathodoluminescence (CL) have been performed. The observed in-situ kinetic measurements of the NBOHC evolution as a function of the electron beam irradiation time agree with the CML result analysis. The influence of three main factors on the generation and bleaching of emitting defects are characterized: the irradiation type, the accumulated dose and the type of defect.

Domaines: Sciences de l'ingénieur [physics]

Imène Reghioua, Aziz Boukenter, Antonino Alessi, Mattia Fanetti, Diego Di Francesca, et al.. Spatial distributions of NBOHCs in an electron and gamma-ray irradiated germanosilicate optical fiber. 12th Conference SiO2 and Advanced Dielectrics (SiO2 2018), Jun 2018, Bari, Italy. ⟨ujm-01964726⟩