High resolution instrumentation system for fibre-Bragg grating aerospace sensors

被引：64

作者：

Ezbiri, A ^{[1
]}

Kanellopoulos, SE ^{[1
]}

Handerek, VA ^{[1
]}

机构：

[1] Univ London Kings Coll, Dept Elect & Elect Engn, London WC2R 2LS, England

来源：

OPTICS COMMUNICATIONS | 1998年 / 150卷 / 1-6期

关键词：

Bragg grating sensors; signal processing;

D O I：

10.1016/S0030-4018(97)00731-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A passive technique for high-resolution detection of the wavelength of peak reflection from fibre Bragg grating (FBG) sensors is presented. The approach, based on a de-convolution of the FBG spectrum and the spectrometer resolution essentially overcomes the low spectral resolution (approximate to 0.1 nm) associated with commercial spectrometers employing CCD detection. The performance of two algorithms, the Centroid Detection algorithm (CDA) and the least squares method (LSQ), are compared. The LSQ algorithm offers resolution enhancement of at least two orders of magnitude and is shown to be independent of the FBG intensity and bandwidth over a broad range. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：43 / 48

页数：6

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