Intensity modulation type fiber-optic strain sensor based on a Mach-Zehnder interferometer constructed by an up-taper with a LPG

被引：29

作者：

Wang, Youqing ^{[1
]}

Shen, Changyu ^{[1
,2
]}

Lou, Weimin ^{[1
]}

Shentu, Fengying ^{[1
]}

机构：

[1] China Jiliang Univ, Inst Optoelect Technol, Hangzhou 310018, Zhejiang, Peoples R China

[2] Zhejiang Univ, State Key Lab Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2016年 / 364卷

关键词：

Strain sensor; Mach-Zehnder interferometer; Long period fiber grating; Fiber up-taper; LONG-PERIOD FIBER; DISPLACEMENT;

D O I：

10.1016/j.optcom.2015.11.006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A highly sensitive and compact fiber-optic strain sensor was presented and experimentally demonstrated. The sensor is based on an in-line fiber Mach-Zehnder interferometer (MZI), which is constructed by connecting a long-period fiber grating (LPG) with an up-taper. With the increasing of the axial strain on the sensor, both of the up-taper's diameter and the light coupling efficiency decreased. By measuring the transmission intensity changes of the resonant dips at wavelength similar to 1553.4 nm under the fiber axial strain ranging from 0 to 590 mu epsilon, the sensitivity of 0.026 dB/mu epsilon was obtained, which is almost 2 times of the existing similar strain sensor. And the results were also confirmed by simulations. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：72 / 75

页数：4

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