Optical fiber axial micro-displacement sensor based on Mach-Zehnder interferometer

被引：56

作者：

Shen, Changyu ^{[1
,2
]}

Wang, Youqing ^{[1
]}

Chu, Jinlei ^{[1
]}

Lu, Yanfang ^{[1
]}

Li, Yi ^{[1
]}

Dong, Xinyong ^{[1
]}

机构：

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

[2] Carleton Univ, Dept Elect, Ottawa, ON K1S 5B6, Canada

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 26期

基金：

中国国家自然科学基金;

关键词：

PHOTONIC-CRYSTAL-FIBER; TAPER; STRAIN;

D O I：

10.1364/OE.22.031984

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A Mach-Zehnder interferometer (MZI) based fiber axial microdisplacement sensor was proposed. The MZI was constructed by a bowknot-type taper (BTT) combining with a fiber core-offset between two single mode fibers (SMFs). The axial micro-displacement of the core offset is correlated with the MZI transmission spectrum and varied with the interferometer arm length. For the arm length L of 12, 18, 24 and 30 mm, the proposed sensors showed high sensitivity of -0.362 dB/mu m, -0.385 dB/mu m, -0.332 dB/mu m and -0.235dB/mu m, and temperature errors of -0.056 dB/degrees C, -0.036 dB/degrees C, -0.044 dB/degrees C, -0.048 dB/degrees C, respectively. The theoretical simulations of the energy distributions were also given. The obtained sensitivity of -0.385 dB/mu m is about 150 times high than that of the current similar existing axial micro-displacement sensor. (C) 2014 Optical Society of America

引用

页码：31984 / 31992

页数：9

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