Identical broadband chirped grating interrogationtechnique for temperature and strain sensing
- 10 April 1997
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 33 (8) , 705-707
- https://doi.org/10.1049/el:19970486
Abstract
The authors propose a simple, low-cost technique for the interrogation of fibre Bragg grating (FBG) sensors. The induced mismatch between two identical broadband fibre chirped gratings is used to provide a mechanism for measuring changes in strain/temperature associated with one grating. A linear relationship with detected optical power is seen, with a 10 nm chirp rate facilitating sensing ranges up to 9000 µɛ and 750°C for strain and temperature change, respectively.Keywords
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