Characterisation of a fibre bragg grating system for strain and temperature sensing

We have characterised a strain and temperature sensing system being developed by Southern Photonics that uses a new Optical Interrogator and fibre Bragg gratings. We have determined the key strain and temperature coefficients and shown that strain and temperature can simultaneously be measured. The experimental uncertainty is 5.2 pm when using the 1540 nm fibre Bragg grating, which corresponds to an experimental uncertainty in measuring the temperature of 0.54°C and in measuring the strain of 3.4 με.