期刊
MEASUREMENT SCIENCE AND TECHNOLOGY
卷 13, 期 9, 页码 1446-1449出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/13/9/310
关键词
polarization-maintaining fibre; fibre Bragg grating; interrogation system; multi-axis strain sensor; transverse strain
We report the development of a fibre Bragg grating (FBG) interrogation system that is capable of detecting independently and simultaneously the two orthogonally polarized signals reflected from a polarization-maintaining (PM) FBG. This relaxes the constraints on the bandwidth of the FBG spectrum, allowing the use of a shorter PM FBG (larger bandwidth) for sensing applications where a higher spatial resolution is required. It imposes no limitation on the measurable strain range and strain profile. The interrogation system is capable of decoding the complex spectral responses of a PM FBG subjected to a transverse load.
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