Fiber Bragg gratings with engineered band-gap for sensing applications

In this work, the authors focus the attention on the possibility to engineer the photonic band-gap of fiber Bragg gratings to improve the sensing performances of this class of devices for physical and chemical measurements. In particular, a local cancellation of the grating profile combined with a proper fiber shape tailoring is able to induce strong modifications in its spectral response which in turn can be exploited and customized for specific sensing application.