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Radioluminescence response of germanosilicate optical fibres
University of Sussex, Brighton, BN1 9QH, UK
Optoelectronics Research Centre, University of Southampton, UK.
X-ray irradiation of germanosilicate optical fibres simultaneously produces signals from both the core and substrate and so the radioluminescence spectra record the defect structure of both regions. The data provide evidence for the presence of dopants and trace impurities, as well as intrinsic defects formed by thermal and radiation processing. Examples of the changes in spectra or luminescence sensitivity with radiation dose, the influence of fibre pulling conditions and post irradiation heating are noted. The temperature dependence of the radioluminescence is reported. Whilst most of the intrinsic defects produce broad emission bands, rare earth dopants show line features. However, line features have also been noted for A1 doped fibres. Such studies of fibre luminescence offer a sensitive monitor of changes in the structure of the glass network.
Radiation Effects and Defects in Solids (1993) Vol.127(1) pp.47-59
Copyright University of Southampton 2006