Abstract
A fiber-optic Fabry-Perot interferometer based on UV-curable polymer micro- hemisphere is proposed and demonstrated. The polymer microhemisphere is formed by adhering and solidifying a liquid microdroplet of UV-curable adhesive to the end face of a cleaved single-mode fiber. The height of polymer microhemisphere could be flexibly con- trolled by adjusting the diameter of a single-mode fiber. The theoretical and experimental results demonstrate that the refractive index (RI) and the temperature of external environ- ment can be simultaneously measured by the fringe contrast variation and the wave- length shift of reflection spectra separately, alleviating the cross sensitivity effectively. The obtained temperature and RI sensitivities are about 0.19 nm= � C and 260 dB/RIU in the RI range of 1.38-1.42.
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