Resumen de Measurement of the UV-induced radius decrease in a silicafiber by means of optic and acoustic resonances.
Juan Julián Barriel, Luis A. Sanchez, Martina Delgado-Pinar, Jose Luis Cruz, Antonio Díez, Miguel Vicente Andrés Bou
In this work, we present experimental measurements of the magnitude of the compactation of a photosensitive, commercial fiber (PS1250 from Corning), when it is UV-irradiated atthe fluencies usually employed for UV-inscription of fiber gratings. Such compactation of silica has been identified as the source of scattering loss in gratings. However, there are scarce data about its magnitude in fibers. In order to measure the UV-induced decrease of fiber radius, sensing techniques must present high sensitivities and low detection limits. Here we present two methods with thesecharacteristics: the use of optical azimuthal resonances, so called Whispering Gallery Modes Resonances (WGMRs), and optically generated transversal radial acoustic resonances, combined with WGMRs. In this abstract we present the experimental procedures and the data provided by each technique. The further analysis of the results to analyze the effect of UV radiation on different parameters of the fibre is work in progress.
