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.
Original language | English |
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Pages (from-to) | 461-469 |
Number of pages | 9 |
Journal | Optics Express |
Volume | 27 |
Issue number | 2 |
Early online date | 7 Jan 2019 |
DOIs | |
Publication status | Published - 7 Jan 2019 |
Bibliographical note
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing AgreementKeywords
- Fibre Bragg grating
- sensing temperature
- sensor grating