All-fibre optical sensing system: Bragg grating sensor interrogated by a long-period grating

被引：90

作者：

Fallon, RW ^{[1
]}

Zhang, L ^{[1
]}

Everall, LA ^{[1
]}

Williams, JAR ^{[1
]}

Bennion, I ^{[1
]}

机构：

[1] Aston Univ, Photon Res Grp, Dept Elect Engn & Comp Sci, Birmingham B4 7ET, W Midlands, England

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 1998年 / 9卷 / 12期

关键词：

strain; fibre Bragg gratings; modulation; smart structures;

D O I：

10.1088/0957-0233/9/12/007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report here a simple, low-cost all-fibre grating strain sensing interrogation technique offering high static-strain resolution (0.5 mu epsilon) and large dynamic range (>8100 mu epsilon). A key interrogating component of this technique is a long-period grating which acts as an edge filter converting strain-induced wavelength variation into optical power measurement. The transmission profile of the long-period grating is shown to be nearly linear over a sufficiently wide range, yielding a linear relationship between the resultant intensity and applied strain, and a high resolution achieved by standard lock-in techniques.

引用

页码：1969 / 1973

页数：5

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