Proceedings PaperLarge Core High Numerical Aperture Fibres
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In short distance optical fibre communication systems, especially those using LED sources and a large number of connectors, the optical power transmitted is limited by the core size and numerical aperture (NA) of the fibre. For military and some civil applications the cabled fibre must provide stable operation over a wide temperature range and resist degradation in a variety of environments, including exposure to nuclear radiation. Two approaches to satisfy the fibre requirements have been taken. The first is based on the well established radiation resistance of high purity silica core fibres. The second exploits recent improvements in the control of radiation induced attenuation in doped silica materials.