Fabrication and properties of large core, high NA, high Nd3+ content multimode optical fibres for temperature sensor applications

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Abstract
The fabrication and properties of 0.28 NA, 100/140 μm, multimode alumino-silicate fibre doped with 7.5 wt% Nd3+ is reported. These fibres show excellent potential for use as the sensing element in intrinsic optical fibre temperature sensors.