Bending insensitive sensors for strain and temperature measurements with Bragg gratings in Bragg fibers

被引：47

作者：

Liu, Ningliang ^{[1
]}

Li, Yuhua ^{[1
]}

Wang, Ying ^{[2
]}

Wang, Haiyan ^{[1
]}

Liang, Wenbin ^{[1
]}

Lu, Peixiang ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Wuhan Inst Technol, Sch Sci, Wuhan 430074, Peoples R China

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 15期

基金：

中国国家自然科学基金;

关键词：

PHOTONIC CRYSTAL FIBER; DISCRIMINATION; LASER;

D O I：

10.1364/OE.19.013880

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel fiber Bragg grating (FBG) has been inscribed in all solid Bragg fiber by an infrared femtosecond laser. Temperature, strain and bending characteristics of the induced FBG are investigated experimentally. Four resonant dips in the transmission spectrum show positive sensitivity for temperature/strain and zero-sensitivity for bending in wavelength. Cross-sensitivity between strain/temperature and bending can thus be avoided since the resonant wavelengths are insensitive to curvature variation when the fiber is bent toward two opposite directions. Evident wavelength hysteresis is observed during the isochronal annealing test and it can be eliminated by a pre-annealing treatment. These proposed FBGs are very attractive candidates for multi-parameter sensors in harsh environment. (C) 2011 Optical Society of America

引用

页码：13880 / 13891

页数：12

共 20 条

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