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Temperature‐independent vibration sensor with a fiber Bragg grating
Author(s) -
Zhou Wenjun,
Dong Xinyong,
Shen Changyu,
Zhao ChunLiu,
Chan Chi Chiu,
Shum Ping
Publication year - 2010
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.25429
Subject(s) - fiber bragg grating , cantilever , optics , materials science , deflection (physics) , vibration , beam (structure) , bandwidth (computing) , microwave , curvature , optical fiber , optical power , acoustics , engineering , physics , telecommunications , laser , composite material , geometry , mathematics
A novel temperature‐independent vibration sensor based on a fiber Bragg grating (FBG) is demonstrated.The FBG was glued in a slanted direction onto the lateral side of a right‐angled triangle cantilever beam. Vertical vibration applied to the cantilever beam leads to a periodical variation of bending curvature along the beam length. As a result of beam bending, the FBG is chirped and its reflection bandwidth and optical power change with the deflection of the beam. Experimental results were compared with the data of vibration measurement of a conventional resistance strain gauge. Good agreement has been achieved. The sensor is temperature independent, owning to the temperature‐independence nature of the reflection bandwidth and optical power of the FBG. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2282–2285, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25429