Strain-insensitive twist and temperature sensor based on seven-core fiber

被引：47

作者：

Liu, Chi ^{[1
,2
]}

Jiang, Yajun ^{[1
,2
]}

Du, Bobo ^{[1
,2
]}

Wang, Tao ^{[1
,2
]}

Feng, Dingyi ^{[1
,2
]}

Jiang, Biqiang ^{[1
,2
]}

Yang, Dexing ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Sch Sci, MOE Key Lab Mat Phys & Chem Extraordinary Condit, Xian 710072, Shaanxi, Peoples R China

[2] Northwestern Polytech Univ, Sch Sci, Shaanxi Key Lab Opt Informat Technol, Xian 710072, Shaanxi, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2019年 / 290卷

关键词：

Twist; Temperature; Mach-Zehnder interferometer; Seven-core fiber; Strain; TORSION SENSOR; INTERFEROMETER;

D O I：

10.1016/j.sna.2019.03.026

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 propose a fiber-optic sensor for simultaneous measurement of twist and temperature using a Mach-Zehnder interferometer by sandwiching a segment of seven-core fiber (SCF) between two sections of very short multimode fibers via fusion splicing technique. The cladding diameter and the pitch between adjacent cores of the SCF are measured to be 150 and 41.5 mu m, respectively, larger than those of conventional SCFs, which lead to a higher twist sensitivity. Within twist range from 4.758 to 40.439 radim and temperature range from 30 to 100 degrees C, this sensor shows a twist sensitivity of -400 pm/(raclim) and a temperature sensitivity of 123 pm/degrees C, respectively. The influence of strain is negligible since the strain sensitivity is much lower. The sensor configuration possesses other advantages such as ease of fabricate, high contrast, and low-cost, therefore it exhibits practical applications potentials in engineering machinery and building structural health monitoring. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：172 / 176

页数：5

共 22 条

[1] BIREFRINGENCE AND POLARIZATION MODE-DISPERSION IN SPUN SINGLE-MODE FIBERS [J].