Abstract
Surrounding a long period grating (LPG), fabricated in a standard optical fibre, with a material with a high thermo-optic coefficient enhances the temperature sensitivity of the LPG. Temperature sensitivities as high as 19 nm °C-1 are reported over a temperature range of 1.1 °C. The temperatures at which the LPG exhibits enhanced sensitivity may be tailored by a suitable choice of material.
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