Practical research on photonic crystal fiber micro-strain sensor

被引：10

作者：

Fan, Ronghua ^{[1
,2
]}

Li, Lianqin ^{[1
,2
]}

Zhuo, Yueyang ^{[1
,2
]}

Lv, Xiang ^{[1
,2
]}

Ren, Zhenjun ^{[1
,2
]}

Shen, Jianguo ^{[1
,2
]}

Peng, Baojin ^{[1
,2
]}

机构：

[1] Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Zhejiang, Peoples R China

[2] Joint Res Lab Opt Zhejiang Normal Univ & Zhengjia, Hangzhou 310058, Zhejiang, Peoples R China

来源：

OPTICAL FIBER TECHNOLOGY | 2019年 / 52卷

基金：

国家高技术研究发展计划(863计划);

关键词：

Photonic crystal fiber; Micro-strain detection; Principle of Mach-Zehnder (MZ) interference; Optical fiber taper pull; Evanescent wave;

D O I：

10.1016/j.yofte.2019.101959

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：

In this paper, we study the principle and application of a micro-strain sensor with a single mode fiber - tapered photonic crystal fiber - single mode fiber (SMF-TPCF-SMF) structure. The fabrication process and sensing principle of strain sensor are introduced in detail, and the key problems in the application process are solved. A kind of intermittent cooling tapering technique is proposed, which can obtain high quality interference spectrum. We verified that tapering the photonic crystal fiber in the sensor could effectively improve the sensitivity of the sensor. Experimental results showed that the strain sensitivity of the sensor before tapering is 2.75pm/mu epsilon, and its linear fit is 98.35%; after tapering, the strain sensitivity of the sensor is 5.46pm/mu epsilon, and its linear fit is 98.59% when the strain range is 109.860 - 559.287 mu epsilon. The improved strain sensor with an SMF-TPCF-SMF structure has high sensitivity, good stability, quick response speed, good invertibility, simple manufacturing process, and low cost. Thus, it has broad application value.

引用

页数：5

共 20 条

[1] A temperature-compensated high spatial resolution distributed strain sensor [J].