Spectral properties and lifetime of green emission in γ-ray irradiated bismuth-doped silica photonic crystal fibers
- Autori: Alessi, A.*; Di Francesca, D.; Girard, S.; Morana, A.; Bouazaoui, M.; El Hamzaoui, H.; Bouwmans, G.; Agnello, S.; Cannas, M.; Boukenter, A.; Ouerdane, Y.
- Anno di pubblicazione: 2017
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Bi-doped silica; Optical fiber; Photoluminescence; Radiation effects; Electronic, Optical and Magnetic Materials; Ceramics and Composites; Condensed Matter Physics; Materials Chemistry2506 Metals and Alloys
- OA Link: http://hdl.handle.net/10447/288230
Abstract
We report an experimental investigation focused on the green emission detected in γ-ray irradiated Bismuth-doped photonic crystal fibers. Our photoluminescence spectra, recorded at room temperature, provide evidence for the presence of two emission bands both located at ~ 530 nm (2.34 eV). One emission is detected only in the Bi-doped core while the other, is detected in the cladding. These two emissions feature different excitation spectra and a fast and a slow decay lifetime. The origin of the fast emission decay, about ten nanoseconds, is tentatively attributed to a silica intrinsic defect, whereas the slow component, having lifetime of about 2 μs and featuring anti-stokes emission, is certainly caused by Bi related defects.