Spectral properties and lifetime of green emission in γ-ray irradiated bismuth-doped silica photonic crystal fibers

Antonino Alessi, Simonpietro Agnello, Diego Di Francesca, Marco Cannas, Adriana Morana, El Hamzaoui, Morana, Girard, Di Francesca, Boukenter, Ouerdane, Bouwmans, Bouazaoui, Alessi

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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.
Original languageEnglish
Pages (from-to)100-104
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume482
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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