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Proceedings Paper

Experimental and technical research on fiber Bragg grating vibration measuring based on two matching gratings demodulation
Author(s): Zheng-fang Wang; Qing-mei Sui; Jing Wang; Jun Chang; Gang-ding Peng; Hai-yong Song
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Paper Abstract

The analysis of a novel demodulation technique for Fiber Bragg Grating (FBG) vibration sensors based on two parallel matching gratings has been carried out both theoretically and experimentally. The lineally model between transformed formula of optical power and the central reflection wavelength of sensing grating has been obtained. In addition, the FBG vibration sensor based upon cantilever with equalized strength is designed and the natural frequency of sensor has been obtained by calculations. The vibration experiment have been carried out to verify the feasibility of the modulation approach and the performance of the sensor, the results show that frequency measured by the FBG vibration sensor is agreement with the setting value. Moreover, the experiment also indicate that the sensor have a excellent frequency response at the measuring range of 0~30Hz, and the demodulation technique with two parallel matching gratings work well in the vibration sensing system.

Paper Details

Date Published: 30 January 2012
PDF: 7 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83511I (30 January 2012); doi: 10.1117/12.915977
Show Author Affiliations
Zheng-fang Wang, Shandong Univ. (China)
Qing-mei Sui, Shandong Univ. (China)
Jing Wang, Shandong Univ. (China)
Jun Chang, Shandong Univ. (China)
Gang-ding Peng, The Univ. of New South Wales (Australia)
Hai-yong Song, Shandong Univ. (China)


Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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