High-sensitivity strain sensor based on a helical-core long-period fiber grating

被引：3
|
作者：
Ma, Yiwei [1 ]
Sun, Jing [1 ]
Zhang, Min [1 ]
Zhao, Min [1 ]
Su, Chunbo [1 ]
Chen, Xudong [1 ]
Liu, Zhihai [1 ]
Geng, Tao [1 ]
Sun, Weimin [1 ]
Yuan, Libo [2 ]
机构：
[1] Harbin Engn Univ, Key Lab In Fiber Integrated Opt, Minist Educ China, Harbin 150001, Peoples R China
[2] Guilin Univ Elect Technol, Photon Res Ctr, Guilin 541004, Peoples R China
来源：
OPTICS LETTERS | 2022年 / 47卷 / 15期
关键词：
OPTIC SENSORS;
D O I：
10.1364/OL.463020
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A highly sensitive strain sensor based on a helical-core long-period fiber grating (HC-LPFG) is proposed and experimentally investigated. The helical core is fabricated in the common single-mode fiber by using a high-frequency CO2 laser and hydrogen-oxygen flame. This helical shape core of the structure experienced the highly centralized refractive index modulation, which enhances the strain sensitivity and shortens the length of the sensing area to 2 mm. Experimental results indicate that the maximum strain sensitivity of the HC-LPFG reaches -97 pm/mu epsilon within the measuring range of 0-400 mu epsilon. (C) 2022 Optica Publishing Group
引用
收藏
页码：3748 / 3751
页数：4
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