Multichannel fiber Bragg grating for temperature field monitoring

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Abstract

We demonstrate a multichannel fiber Bragg grating (MC-FBG) based distributed temperature field sensor with millimeter-order spatial resolution. The MC-FBG was designed by using the layer peeling (LP) algorithm with a tailored group delay characteristic and fabricated using seamless UV-inscription. We have achieved a 21-channel MC-FBG with 0.2 nm bandwidth of each channel and 0.5 nm channel gap. The sensor was tested by using a temperature field distribution. Experimental results show that the sensor had a spatial resolution of 3 mm and could measure a maximum temperature gradient of 7.85 °C/mm.

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Original languageEnglish
Pages (from-to)461-469
Number of pages9
JournalOptics Express
Volume27
Issue number2
Early online date7 Jan 2019
DOIs
Publication statusPublished - 7 Jan 2019

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© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

    Keywords

  • Fibre Bragg grating, sensing temperature, sensor grating

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