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Proceedings Paper

Numerical evaluation of fiber optic evanescent wave sensor
Author(s): Hang Ruan; Yaosheng Chen; Shaowu Chen; Mingqiu Xue
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Paper Abstract

Fiber-optic evanescent wave sensor which consists of two D- fibers is analyzed by vectorial finite element method (VFEM) in this paper. Spurious solutions are eliminated out of the region of effective modes by the penalty variation principle. Utilizing mode coupling theory and choosing a large number of finite elements with a number of nodes N equals 1048, several important results for designing the fiber-optic evanescent wave in sensing region is obtained. The relative parameters, including the interval and distance of coupling region, the radii and refractive indices of the D-shape fibers, and the characteristics of sensing medium, are derived. Consequently, the contour map of those parameters is presented, and for a certain medium in sensing region, it is convenient to design an optimal contribution of those parameters.

Paper Details

Date Published: 24 September 1996
PDF: 4 pages
Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); doi: 10.1117/12.252160
Show Author Affiliations
Hang Ruan, Xi'an Institute of Optics and Precision Mechanics (China)
Yaosheng Chen, Xi'an Institute of Optics and Precision Mechanics (China)
Shaowu Chen, Xi'an Institute of Optics and Precision Mechanics (China)
Mingqiu Xue, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 2895:
Fiber Optic Sensors V
Kim D. Bennett; Byoung Yoon Kim; Yanbiao Liao, Editor(s)

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