Simultaneous measurement of strain and temperature based on fiber sensor with Vernier effect

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2023-01-01 DOI:10.1016/j.optlastec.2022.108670

Li Zhao , Shuai Hao , Yunhao Chen , Enming Zhao , Chuanxi Xing , Jing Fan , Jianing Tang

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引用次数: 12

Abstract

A fiber sensor based on Vernier effect for simultaneous temperature and strain measurement is proposed and demonstrated, which consists of a Mach-Zehnder interferometer and a Fabry-Perot interferometer. The two fiber interferometers are highly symmetrical in structure, both contain a hollow core fiber. The interferometer with a hollow core fiber of larger air hole diameter serves as the Fabry-Perot interferometer, and the other one with a hollow core fiber of smaller air hole diameter functions as the Mach-Zehnder interferometer. The Mach-Zehnder interferometer was found to be sensitive to temperature as well as strain, whereas the Fabry-Perot interferometer was only sensitive to strain variation. Due to the different response of two interferometers, the sensor achieved simultaneous measurement of temperature and strain. Leveraging on the Vernier effect and with MZI served as the sensing unit, the sensor provided a temperature sensitivity of − 279.99 pm /℃ and a strain sensitivity of − 5.95 pm/με, respectively. While using Fabry-Perot interferometer as the sensing unit, the sensor showed an enhanced strain sensitivity of 19.17 pm/με.

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基于游标效应光纤传感器的应变和温度同步测量

提出并演示了一种基于游标效应的同时测量温度和应变的光纤传感器，该传感器由Mach-Zehnder干涉仪和Fabry-Perot干涉仪组成。这两个光纤干涉仪在结构上是高度对称的，都包含一个空心芯光纤。其中空芯光纤孔径较大的干涉仪为法布里-珀罗干涉仪，空芯光纤孔径较小的干涉仪为马赫-曾德尔干涉仪。马赫-曾德尔干涉仪对温度和应变都很敏感，而法布里-珀罗干涉仪只对应变变化敏感。由于两个干涉仪的响应不同，该传感器实现了温度和应变的同时测量。利用游标效应和以MZI为传感单元，该传感器的温度灵敏度为−279.99 pm/℃，应变灵敏度为−5.95 pm/με。采用Fabry-Perot干涉仪作为传感单元，传感器应变灵敏度提高到19.17 pm/με。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems