Fabry-Pérot cavities based on photopolymerizable resins for sensing applications

In this work, we have shown the capability to produce Fabry-Perot (FP) cavities based on photopolymerizable resins sandwiched between two single-mode fibers. The process allows easy control of the length of the cavity and an enhancement on the fringe visibility when compared with standard droplet based FP sensors. The method will be employed for the fabrication of four sensors composed of different photopolymerizable resins. Their performance regarding humidity, temperature, pressure and refractive index will be under analysis, revealing that in some cases it is possible to reach better sensitivities than the ones reported in literature.