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Fabrication and characterization of polymer fiber Bragg gratings inscribed with KrF UV laser

Oliveira, R. ; Bilro, L. ; Heidarialamdarloo, J. ; Nogueira, R.N.

Fabrication and characterization of polymer fiber Bragg gratings inscribed with KrF UV laser, Proc Internacional Conf. on Plastic Optical Fibers - POF, Nuremberg, Germany, Vol. 1, pp. 371 - 375, September, 2015.

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Abstract
We report the inscription and characterization of Bragg gratings in different polymer optical fibers.
The inscription was done with a 248 nm UV radiation from a KrF laser, conventionally used for the inscription of silica FBGs. The polymer fiber Bragg gratings were written in a few seconds, due the strong absorption and high photosensitivity of PMMA under deeper wavelengths. This work provides a step forward related with the time needed to inscribe PFBGs. After the inscription, the Bragg gratings were characterized to strain, tempera- ture, pressure and humidity, revealing sensitivities closer to the ones reported for PFBGs inscribed with 325 nm UV radiation.