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In this work, a Raman fibre Bragg-grating laser sensor for strain–temperature measurement is presented. The laser resonator is a linear cavity formed by the reflectivity of the Bragg gratings and the virtual distributed mirror formed from the cooperative Rayleigh scattering in a dispersion-compensating fibre created by the Raman effect. Using one pump laser it is possible to obtain a Raman fibre Bragg-grating laser sensor with a range of ∼35 nm. The sensing system is demonstrated when the fibre Bragg gratings are remotely located at a 10 km distance.
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Frazão et al. (2009) studied this question.
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