Sensitivity-enhanced fiber-optic strain sensor based on interference of higher order modes in circular fibers

被引：80

作者：

Li, Enbang ^{[1
]}

机构：

[1] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2007年 / 19卷 / 13-16期

基金：

中国国家自然科学基金;

关键词：

modal interference; optical fiber devices; optical fibers; optical waveguides; strain sensor;

D O I：

10.1109/LPT.2007.902271

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A sensitivity-enhanced fiber-optic strain sensor based on interference of higher order modes in circular optical fibers is reported. It has been demonstrated that by utilizing the interference of the higher order modes excited in a segment of multimode fiber (MMF), a strain sensor with an enhanced strain sensitivity which is almost twice that of the popularly used fiber-Bragg-grating-based strain sensors can be constructed. The features of the proposed strain sensor include an extremely simple structure, easy fabrication, and low cost. The modal interference in a circular step-index MMF is analyzed and then the sensing principle, fabrication process, and strain measurements are described.

引用

页码：1266 / 1268

页数：3

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