光通信技术2024，Vol.48Issue(1)：13-17,5.DOI:10.13921/j.cnki.issn1002-5561.2024.01.003
基于并联游标效应的MZ光纤应变传感器增敏解调系统
Sensitization and demodulation system of MZ optical fiber strain sensor based on parallel vernier effect
摘要
Abstract
In order to improve the sensitivity of Mach-Zender(MZ)optical fiber strain sensor,a MZ optical fiber strain sensor sensitization demodulation system based on parallel cursor effect is designed.The system consists of a sensing interferometer and a reference interferometer in parallel,both of which are Mach-Zehnder interferometer(MZI)with a single mode fiber-no-core fiber-few-mode fiber-single mode fiber(SNFS)structure.By extracting the difference frequency components of two SNFS-MZI signals and tracking the movement of their troughs,the strain sensitivity of the system is improved.In addition,the temperature crosstalk during strain measurement is reduced by extracting the interference spectrum of the reference interferometer separately.The experimental results show that the strain sensitivity of the system is 7.39 pm/με,which is about 5 times that of a single sensor interferometer.By adjusting the sensing arm length of the reference interferometer and the sensing interferometer,the sensitivity performance of the MZ optical fiber strain sensor sensitization demodulation system can be flexibly adjusted.关键词
光纤光学/马赫-曾德尔干涉仪/并联游标效应/应变/温度串扰Key words
fiber optics/Mach-Zehnder interferometer/parallel vernier effect/strain/temperature crosstalk分类
信息技术与安全科学引用本文复制引用
王婷婷,柯炜,王秀婷..基于并联游标效应的MZ光纤应变传感器增敏解调系统[J].光通信技术,2024,48(1):13-17,5.基金项目
国家自然科学基金项目(61405094)资助 （61405094）
江苏高校优势学科Ⅲ期建设工程项目资助. （）
