Interferometric temperature-insensitive strain measurement with different-diameter fiber Bragg gratings

被引：51

作者：

Song, M ^{[1
]}

Lee, B ^{[1
]}

Lee, SB ^{[1
]}

Choi, SS ^{[1
]}

机构：

[1] KOREA INST SCI & TECHNOL, APPL PHYS GRP, SEOUL 130650, SOUTH KOREA

来源：

OPTICS LETTERS | 1997年 / 22卷 / 11期

关键词：

D O I：

10.1364/OL.22.000790

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An interferometric strain-sensing system that combines an unbalanced Mach-Zehnder wavelength discriminator and spliced different-diameter fiber Bragg gratings is presented that has the capability to distinguish strain from temperature effects. Because the gratings are written in 135- and 165-mu m-diameter fibers drawn from the same preform, when they are spliced they show similar temperature sensitivities but different responses to applied strain. Thus the relative Bragg wavelength difference of the two gratings is affected only by strain, and one can measure it accurately by monitoring the amplitude variation of the interference signal rather than the conventional phase variation. (C) 1997 Optical Society of America.

引用

页码：790 / 792

页数：3

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