Teflon FEP-clad fluoride glass fibre

A mid infra-red optical fibre has been developed employing perfluoronated ethylene propylene (teflon FEP) as the cladding and BaF2-GdF3-ZrF4-AlF3 glass as the core. The minimum transmission loss was 0.37 dB/m, measured at 2.55 μm for a 24 m long fibre.