Directional bending sensing characteristics of in-line Mach-Zehnder interferometer based on asymmetrical twin-core fiber

被引：0
|
作者：
Yang, Huiping [1 ]
Yan, Binbin [1 ]
Luo, Yanhua [2 ,3 ]
Yang, Liwei [4 ]
Wang, Kuiru [1 ]
Yuan, Jinhui [1 ]
Sang, Xinzhu [1 ]
Peng, Gang-ding [3 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Shanghai Univ, Shanghai Inst Adv Commun & Data Sci, Key Lab Specialty Fiber Opt & Opt Access Networks, Joint Int Res Lab Specialty Fiber Opt & Adv Commu, Shanghai 200444, Peoples R China
[3] Univ New South Wales, Sch Elect Engn, Photon & Opt Commun, Sydney, NSW 2052, Australia
[4] China Agr Univ, Coll Informat & Elect Engn, Beijing 100083, Peoples R China
来源：
ADVANCED SENSOR SYSTEMS AND APPLICATIONS XII | 2022年 / 12321卷
关键词：
Asymmetric twin-core fiber; Optical fiber sensor; Mach-Zehnder interferometer; Directional bending sensing; PHOTONIC CRYSTAL FIBER; OPTICAL-FIBER; SENSOR; TEMPERATURE; VECTOR;
D O I：
10.1117/12.2642212
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 and experimentally demonstrate a simple directional bending sensor based on an in-line Mach-Zehnder interference structure of the single mode fiber (SMF)-multimode fiber (MMF)-asymmetrical twin-core fiber (ATCF)-MMF-SMF. Due to the asymmetric structure in twin-core fiber, this sensor can discriminate different bending directions. The interference spectrum shifts with the change of curvature. Furthermore, the sensor exhibits a linear response with a maximum bending sensitivity of 33.48 and -38.72 nm/m(-1) in the curvature range from 0 to 3.01 m(-1) for bending directions at -x (180 degrees) and +x (0 degrees) directions, respectively. The proposed fiber sensor has great potential in the future Internet of Things (IoT) due to its advantages, such as low cost, compactness, and high bending sensitivity.
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页数：7
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