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Chin. Opt. Lett.
 Home  List of Issues    Issue 11 , Vol. 02 , 2004    High sensitivity fiber Bragg grating pressure difference sensor


High sensitivity fiber Bragg grating pressure difference sensor
Haiwei Fu1;2, Junmei Fu1, Xueguang Qiao2
1School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 7100492School of Science, Xi'an Shiyou University, Xi'an 710065

Chin. Opt. Lett., 2004, 02(11): pp.621-621-

DOI:
Topic:Fiber optics and optical communications
Keywords(OCIS Code): 060.2310  060.2340  050.2770  060.2370  

Abstract
Based on the effect of fiber Bragg grating (FBG) pressure difference sensitivity enhancement by encapsulating the FBG with uniform strength beam and metal bellows, a FBG pressure difference sensor is proposed, and its mechanism is also discussed. The relationship between Bragg wavelength and the pressure difference is derived, and the expression of the pressure difference sensitivity coefficient is also given. It is indicated that there is good linear relation between the Bragg wavelength shift and the pressure difference of the sensor. The theoretical and experimental pressure difference sensitivity coefficients are 38.67 and 37.6 nm/MPa, which are 12890 and 12533 times of that of the bare FBG, respectively. The pressure difference sensitivity and dynamic range can be easily changed by changing the size, Young's modulus, and Poisson's ratio of the beam and the bellows.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2004/7/2
Accepted:
Posted online:

Get Citation: Haiwei Fu, Junmei Fu, Xueguang Qiao, "High sensitivity fiber Bragg grating pressure difference sensor," Chin. Opt. Lett. 02(11), 621-621-(2004)

Note: This work was supported by the National Natural Science Foundation of China (No. 69877025), the National "863" Project of China (No. 2002AA313150), the Major Science and Technology Project of Ministry of Education (No. 02190), the National Natural Science Foundation of Shaanxi Province (No. 2000C34), the Science and Technology Project of the Education Department of Shaanxi Province (No. 02JK148), and the Science and Technology Project of Xi'an (No. GG200126). H. Fu's e-mail address is hwfu2@tom.com.



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