Determination of the coefficient of thermal expansion of an anisotropic material with Bragg grating interferometers

被引：2

作者：

Swart, PL ^{[1
]}

Chtcherbakov, AA ^{[1
]}

van Wyk, AJ ^{[1
]}

机构：

[1] Rand Afrikaans Univ, Ctr Opt Commun & Sensors, ZA-2006 Auckland Pk, South Africa

来源：

17TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, PTS 1 AND 2 | 2005年 / 5855卷

关键词：

thermal expansion; anisotropy; Bragg grating; Fabry-Perot interferometer; steel;

D O I：

10.1117/12.623586

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

This paper introduces a fibre-optic interferometric technique for experimental determination of the coefficients of thermal expansion of anisotropic solids. It is based on the use of three low-finesse fibre Bragg grating Fabry-Perot interferometers of different lengths. Expressions are derived for the coefficients of thermal expansion in terms of the phase shift per unit cavity length of the individual interferometers. Measurements of the coefficients of thermal expansion of a specific type of rolled steel yielded values of 12.7 x 10(-6) degrees C-1 and 7.5 x 10(-6) degrees C-1 in the axial and the transverse direction respectively.

引用

页码：747 / 750

页数：4

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