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Sensors (Basel). 2009;9(10):8377-81. doi: 10.3390/s91008377. Epub 2009 Oct 22.

Arrays of regenerated fiber bragg gratings in non-hydrogen-loaded photosensitive fibers for high-temperature sensor networks.

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  • 1Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany; E-Mails: (S.B.); (M.B.); (M.R.); (H.B.).


We report about the possibility of using regenerated fiber Bragg gratings generated in photosensitive fibers without applying hydrogen loading for high temperature sensor networks. We use a thermally induced regenerative process which leads to a secondary increase in grating reflectivity. This refractive index modification has shown to become more stable after the regeneration up to temperatures of 600 °C. With the use of an interferometric writing technique, it is possible also to generate arrays of regenerated fiber Bragg gratings for sensor networks.


Bragg gratings; grating regeneration; temperature sensing

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