Seven-Core Fiber Composite Structures-Based Mach-Zehnder Interferometer for Bending and Temperature Measurement  

作　　者：Kai ZHANG Qiang LING Yao CHEN Si LUO Yusheng ZHANG Yan ZHOU Gaofeng FENG Junyong YANG Zhangwei YU Haiyun CHEN Xiuli JIANG Zuguang GUAN Daru CHEN 

机构地区：[1]Hangzhou Institute of Advanced Studies,Zhejiang Normal University,Hangzhou 311231,China [2]Futong Group Co.,Ltd.,Fuyang,Hangzhou 311499,China [3]College of Science,Zhejiang University of Technology,Hangzhou 310023,China [4]Key Laboratory of Optical Information Detection and Display Technology of Zhejiang,Zhejiang Normal University,Jinhua 321004,China [5]Department of Mathematics and Physics,University of Shanghai Electric Power,Shanghai 200090,China

出　　处：《Photonic Sensors》2025年第1期114-121,共8页光子传感器(英文版)

基　　金：supported by“Pioneer”and“Leading Goose”Research&Development Program of Zhejiang,China(Grant No.2022C03084);the Natural Science Foundation of China(Grant No.62205296);the Zhejiang Provincial Natural Science Foundation of China(Grant Nos.LQ22F050007 and LQ23F050004);the Ningbo Science and Technology Project,China(Grant No.2021Z030).

摘　　要：In the paper,an optical fiber sensor based on a seven-core fiber composite structure is presented,which enables dual-parameter sensing of bending and temperature.The proposed structure is fabricated by combining the strongly-coupled seven-core fibers(SC-SCFs)and a weakly-coupled seven-core fiber(WC-SCF).The SC-SCF acts as a beam coupler and enhances the Mach-Zehnder interference,while the WC-SCF serves as the enhanced section of another Mach-Zehnder interference.Therefore,the spectrum response of the fiber structure mentioned above exhibits a superposition effect of two Mach-Zehnder interferometers(MZIs).Among them,two dips corresponding to different MZIs are used to measure bending and temperature.The experimental results show the bending sensitivity and temperature sensitivity of the two MZIs are-4.238 nm/m^(-1),-2.263 nm/m^(-1),0.047 nm/℃,and 0.064 nm/,respectively.It proves℃that our sensor is very sensitive to bending.Through the dual-wavelength matrix method,the bending and temperature can be measured simultaneously.With the benefit of the composite structure,low cost,and ease of fabrication,the proposed sensor can be used in harsh environments.

关 键 词：Optical fiber sensor strongly coupled seven-core fiber weakly-coupled seven-core fiber BENDING temperature 

分 类 号：TN253[电子电信—物理电子学]