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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.

Author information

  • 1Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany; E-Mails: sven.brueckner@ipht-jena.de (S.B.); martin.becker@ipht-jena.de (M.B.); manfred.rothhardt@ipht-jena.de (M.R.); hartmut.bartelt@ipht-jena.de (H.B.).

Abstract

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.

KEYWORDS:

Bragg gratings; grating regeneration; temperature sensing

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