Optoelectronic sensor for simultaneous and independent temperature and elongation measurement using Bragg gratings

The present article proposes a system for a sensor for simultaneous measuring of elongation and temperature, using two fibers Bragg gratings with different resonance wavelengths. For measuring the elongation, linearity was obtained for the conversion characteristic of 0.06% and 0.08% respectively for the first and second Bragg gratings. In the case of the sensor proposed, the non-linearity errors of the temperature conversion characteristic were 3.43% and 2.36% respectively for the first and second gratings. Slowa kluczowe: światlowodowe siatki Bragga, czujniki optoelektroniczne, czujniki wydluzenia, nieczule na zmiany temperatury.

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