A new strain sensor based on depth-modulated long-period fiber grating

被引：10
作者：
Yi, Yang [1 ]
Ma, Yiwei [1 ]
Wang, Senyu [1 ]
Li, Xiaoyang [1 ]
Zhu, Hongjia [1 ]
Sun, Cuiting [1 ]
Zhang, Shuo [1 ]
Yao, Chong [1 ]
Tong, ChengGuo [1 ]
Geng, Tao [1 ]
Sun, WeiMing [1 ]
Yuan, Libo [2 ]
机构：
[1] Harbin Engn Univ, Key Lab 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：
INFRARED PHYSICS & TECHNOLOGY | 2020年 / 111卷
基金：
中国国家自然科学基金;
关键词：
Strain sensor; Long period fiber grating; Depth modulation; TEMPERATURE;
D O I：
10.1016/j.infrared.2020.103520
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In this paper, a novel strain sensor based on Depth-Modulated Long Period Fiber Grating (DM-LPFG) is presented and demonstrated. One side polished deformations with different milling depth are fabricated by a high frequency CO2 laser, so the DM-LPFG possesses a staircase-shaped structure. This kind of structure provides the high strain sensitivity of DM-LPFG. Experimental results clearly demonstrate that the structure has excellent mechanical capacity and repeatability. The sensor has a considerable strain sensitivity, which can reach up to 27.4 pm/mu epsilon with the range of 0-450 mu epsilon, it is an order of magnitude higher than conventional CO2 laser induced LPFG. The temperature characteristic is 49 pm/degrees C with the range of 30-170 degrees C. Furthermore, the strain sensor possesses a compact structure, with a total length of 9 mm.
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页数：5
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