Simultaneous measurement of temperature and relative humidity by compact Mach-Zehnder interferometer and Fabry-Perot interferometer

被引：49

作者：

Tong, Rui-jie ^{[1
]}

Zhao, Yong ^{[1
]}

Zheng, Hong-kun ^{[1
]}

Xia, Feng ^{[1
]}

机构：

[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang 110819, Peoples R China

来源：

MEASUREMENT | 2020年 / 155卷

基金：

中国国家自然科学基金;

关键词：

Relative humidity sensor; Temperature measurement; Fabry-Perot interferometer; Mach-Zehnder interferometer; HOLLOW-CORE FIBER; SENSOR; MICROFIBER;

D O I：

10.1016/j.measurement.2020.107499

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel and compact temperature and relative humidity (RH) simultaneously measurement sensor based on compact Mach-Zehnder interferometer (MZI) and Fabry-Perot interferometer (FPI) is proposed and experimental implemented. The sensing structure is made by splicing a 200 mu m single mode fiber (SMF) between two 10 cm SMFs with large core-offset. The core-offset distance is 62.8 mu m coated with RH sensitive material graphene quantum dots and polyvinyl alcohol (GQDs-PVA). The transmitted structure acts as MZI, and the reflected structure acts as FPI, then the simultaneous detection of temperature and RH can be achieved by monitoring the spectrums of FPI and MZI, respectively. The sensitivity to RH is -0.132 nm/%RH with resolution of 0.15 %RH, and the sensitivity to temperature is 0.37 nm/degrees C with the resolution of 0.05 degrees C. The proposed sensor is compact, high sensitivity, simple making and low cost. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：6

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