Abstract
Experimental data on absorption and luminescence in optical fibres with a Bi : SiO2 glass core are compared to experimentally determined and calculated spectroscopic properties of theBiO molecule. The results suggest that the IR luminescence of Bi : SiO2 glass is due to interstitial BiO molecules. This assumption is supported by quantum-chemical simulation results for a BiO molecule in a ring interstice of the silica glass network.
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