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We present a proof-of-concept experiment aimed at increasing the sensitivityof temperature sensors implemented with Fiber Bragg gratings by making use of aweak value amplification scheme. The technique requires only linear opticselements for its implementation, and appears as a promising method forextending the range of temperatures changes detectable to increasingly lowervalues than state-of the-art sensors can currently provide. The deviceimplemented here is able to generate a shift of the centroid of the spectrum ofa pulse of $\mathrm{\sim 0.035\,nm/^{\circ}C}$, a nearly fourfold increase insensitivity over the same Fiber Bragg Grating system interrogated usingstandard methods.

Enhancement of the sensitivity of a temperature sensor based on Fiber Bragg Gratings via weak value amplification