Studies on a few-mode fiber-optic strain sensor based on LP01-LP02 mode interference

被引：66

作者：

Kumar, A ^{[1
]}

Goel, NK ^{[1
]}

Varshney, RK ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, New Delhi 110016, India

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2001年 / 19卷 / 03期

关键词：

few-mode fiber sensor; interferometric sensor; modal sensor; optical fiber sensor; strain sensor;

D O I：

10.1109/50.918888

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：

We studied a tiber-optic strain sensor based on interference between LP01-LP02 modes of a circularly symmetric few-mode fiber (FMF). A simple theoretical analysis fdr predicting the performance characteristics of such a sensor is developed. Fiber elongations producing differential phase shift of 2 pi (deltal(2 pi)) between the two modes are measured, which is found to be independent of sensing length of the fiber as predicted by theory. A good agreement between the experimental and theoretical values of deltal(2 pi) is observed. Theoretical calculations predict that the sensitivity of such a sensor is maximum for fibers with V = 4.82 and increases with the increase in the core cladding index difference Deltan.

引用

页码：358 / 362

页数：5

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