A dual-parameter fiber sensor based on few-mode fiber and fiber Bragg grating for strain and temperature sensing

被引：109
作者：
Gao, Xuekai [1 ]
Ning, Tigang [1 ]
Zhang, Chuanbiao [1 ]
Xu, Jian [1 ]
Zheng, Jingjing [1 ]
Li, Heng [1 ]
Li, Jing [1 ]
Pei, Li [1 ]
You, Haidong [2 ]
机构：
[1] Beijing Jiaotong Univ, Inst Lightwave Technol, Key Lab All Opt Network & Adv Telecommun Network, Beijing 100044, Peoples R China
[2] Qingdao Agr Univ, Sci & Informat Coll, Qingdao 266109, Shandong, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2020年 / 454卷
基金：
中国国家自然科学基金;
关键词：
Fiber optical sensor; Few-mode fiber; Fiber Bragg grating; REFRACTIVE-INDEX; SENSITIVITY; INTERFERENCE; INTERFEROMETERS; DISCRIMINATION;
D O I：
10.1016/j.optcom.2019.124441
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An optical fiber temperature and strain fiber sensor based on the few-mode fiber (FMF) and the fiber Bragg grating (FBG) is proposed and demonstrated. The sensor unit is fabricated by a length of FMF offset splicing with one section of single-mode fiber (SMF). The temperature and strain are measured simultaneously because of the different sensitivities of the spectrum dips. The interference with the highest extinction ratio of 23 dB can be achieved. The temperature sensitivities of -34.3 pm/degrees C and 10.7 pm/degrees C and strain sensitivities of -2 pm/mu epsilon and 0.67 pm/mu epsilon are achieved, respectively. The proposed sensor may exhibit the great potential in fields of the dual-parameter measurement due to its compact structure, simple configuration.
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页数：5
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