In this work we investigated the point defects at the origin of the degradation of radiation-tolerant optical fibers used in the visible part of the spectrum for plasma diagnostics in radiation environments. For this aim, the effects of γ -ray irradiation up to the dose of 10 MGy(SiO2) and post-irradiation thermal annealing at 550◦C were studied for a Fluorinedoped fiber. An absorption peaking around 2 eV is mainly responsible for the measured radiation-induced losses, its origin being currently debated in the literature. On the basis of the unchanging shape of this band with the radiation dose, its correlation with the 1.9 eV photoluminescent band and the thermal treatment results we assign the asymmetric absorption around 2 eV to an unique defect, the NBOHC, instead of a set of various defects.
Morana, A., Cannas, M., Girard, S., Boukenter, A., Vaccaro, L., Périsse, J., et al. (2013). Origin of the visible absorption in radiation-resistant optical fibers. OPTICAL MATERIALS EXPRESS, 3 [10.1364/OME.3.001769].
Origin of the visible absorption in radiation-resistant optical fibers
MORANA, Adriana;CANNAS, Marco;VACCARO, Lavinia;BOSCAINO, Roberto
2013-01-01
Abstract
In this work we investigated the point defects at the origin of the degradation of radiation-tolerant optical fibers used in the visible part of the spectrum for plasma diagnostics in radiation environments. For this aim, the effects of γ -ray irradiation up to the dose of 10 MGy(SiO2) and post-irradiation thermal annealing at 550◦C were studied for a Fluorinedoped fiber. An absorption peaking around 2 eV is mainly responsible for the measured radiation-induced losses, its origin being currently debated in the literature. On the basis of the unchanging shape of this band with the radiation dose, its correlation with the 1.9 eV photoluminescent band and the thermal treatment results we assign the asymmetric absorption around 2 eV to an unique defect, the NBOHC, instead of a set of various defects.File | Dimensione | Formato | |
---|---|---|---|
OME13.pdf
accesso aperto
Descrizione: Articolo principale
Dimensione
230.3 kB
Formato
Adobe PDF
|
230.3 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.