Abstract
In this letter, we propose a high resolution temperature insensitive interrogation technique for FBG sensors where one FBG acts as an edge filter to interrogate a separate FBG sensor. A high resolution of better than 5 με in strain measurement range from 0 to 1100 με and the best resolution of better than 1 με were verified by experiments. An error of only ±2.2 με is achieved over a temperature range from 15 to 50 °C, indicating that this strain interrogation technique is temperature insensitive. Using an altered system configuration, the temperature was also measured simultaneously with a resolution better than 0.2 °C.
Original language | English |
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Pages (from-to) | 653-656 |
Journal | Optics and Laser Technology |
Volume | 42 |
Issue number | 4 |
DOIs | |
Publication status | Published - Jun 2010 |
Keywords
- ratiometric system
- FBG
- edge filter