Dual measurement of strain and temperature using the combination of Er{sup}(3+)-doped fibre fluorescence lifetime and a fibre Bragg grating

摘要

Fibre optic sensing devices have been produced for the dual measurement of strain and temperature using the combined properties of fibre Bragg gratings and the fluorescence lifetime of erbium-doped fibre. Two different sensors were constructed with the fibre Bragg grating written in normal fibre and also written directly in the Er{sup}(3+)-doped fibre. Results obtained indicate that this technique can be used to measure strains and temperatures with accuracies of approximately 1.2℃ and 20.4 μ2L?