Abstract:During the last decade, a strong progress has been made in the photo-writing of fiber Bragg gratings (FBGs) in polymer optical fibers (POFs), driven by the continuous wish to enhance the grating reflectivity and improve the sensing performances. In this paper, we report the photo-inscription of highly reflective gratings in step-index POFs, obtained from a slight etching of the cladding. We demonstrate that a cladding diameter decrease of ~20% is an ideal trade-off to produce highly reflective gratings with en… Show more
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