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Temperature-independent vibration sensor with a fiber Bragg grating

✍ Scribed by Wenjun Zhou; Xinyong Dong; Changyu Shen; Chun-Liu Zhao; Chi Chiu Chan; Ping Shum

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
395 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

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

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Figure 5 Theoretical and experimental results for the gain of various antenna configurations experiments. The requirements on the ground-plane spacing are more and more relaxed then. REFERENCES 1. L. Giauffret and J.M. Laheurte, Microstrip antennas fed by con-Ž . ductor backed coplanar waveguides, E