Sensors (Oct 2009)

Arrays of Regenerated Fiber Bragg Gratings in Non-Hydrogen-Loaded Photosensitive Fibers for High-Temperature Sensor Networks

  • Hartmut Bartelt,
  • Johan Vlekken,
  • Martin Becker,
  • Christoph Chojetztki,
  • Manfred Rothhardt,
  • Sven Brueckner,
  • Eric Lindner

DOI
https://doi.org/10.3390/s91008377
Journal volume & issue
Vol. 9, no. 10
pp. 8377 – 8381

Abstract

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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.

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