Strain, bending, refractive index independent temperature sensor based on a graded index multimode fiber embedded long period fiber grating

被引：15

作者：

Niu, Huiwen ^{[1
]}

Chen, Wenhuan ^{[1
]}

Liu, Yue ^{[1
]}

Jin, Xiren ^{[1
]}

Li, Xiang ^{[1
]}

Peng, Feng ^{[2
]}

Geng, Tao ^{[1
]}

Zhang, Shuo ^{[1
]}

Sun, Weimin ^{[1
]}

机构：

[1] Harbin Engn Univ, Key Lab In Fiber Integrated Opt, Minist Educ China, Coll Phys & Optoelect Engn, Harbin 150001, Peoples R China

[2] Univ Jinan, Sch Phys & Technol, Jinan 250022, Peoples R China

来源：

OPTICS EXPRESS | 2021年 / 29卷 / 15期

基金：

中国国家自然科学基金;

关键词：

POLARIZATION-MAINTAINING FIBER;

D O I：

10.1364/OE.430168

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel embedded ultra-long period fiber grating (EULPFG) based on a graded index multimode fiber (GI-MMF) is proposed for temperature measurement. Due to the small RI difference of the modes near the GI-MMF self-imaging point, the resonant peak of transmission spectrum is wavelength-insensitive to refractive index (RI), strain and bending. However, the sensor is sensitive to temperature. The experimental results show that the temperature sensitivity of the EULPFG is 90.77 pm/degrees C. The sensitivities of other physical parameters are suppressed, and the suppressed sensitivities are at least one order of magnitude less than those of similar sensors. The EULPFG with anti-interference from other parameters is expected to be used in ocean monitoring systems to measure the temperature of the seawater. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：22922 / 22930

页数：9

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