IR luminescence of tellurium-doped silica-based optical fibre

Tellurium-doped germanosilicate fibre has been fabricated by the MCVD process. In contrast to Te-containing glasses studied earlier, it has a broad luminescence band (full width at half maximum of ~350 nm) centred at 1500 nm, with a lifetime of ~2 μs. The luminescence of the fibre has been studied before and after gamma irradiation in a 60Co source to 309 and 992 kGy. The irradiation produced a luminescence band around 1100 nm, with a full width at half maximum of ~400 nm and lifetime of ~5 μs.