Dual determination of strain and temperature using cascaded fiber Fabry–Perot interferometers with wavelength and phase demodulation

IF 1.3 4区工程技术 Q4 CHEMISTRY, ANALYTICAL

Instrumentation Science & Technology Pub Date : 2022-08-18 DOI:10.1080/10739149.2022.2111575

Yang Yu, Yuan-xin Li, Feng Xia, Bo Liu

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引用次数: 1

Abstract

Abstract A strain and temperature dual-parameter measurement device using cascaded optical fiber Fabry–Perot interferometers (FPIs) is reported in which both wavelength demodulation and phase demodulation are employed with the the parameters. A single-mode fiber (SMF), a short length of hollow-core fiber (HCF), a short section of SMF, and an HCF are spliced together to form the cascaded FPIs. In this structure, two dominant interference cavities are formed and two FPIs are generated, which are an air-cavity FPI and an air-silica cavity FPI. The sensitivities of the air-cavity FPI and the air-silica cavity FPI to strain or temperature are different, allowing the measurement of both parameters. In terms of wavelength demodulation, the temperature sensitivity of the air-cavity FPI (designated as FPI1) is 1.39 pm/°C and that of the air-silica cavity (designated as FPI2) is 8.56 pm/°C from 25 to 85 °C. In the strain range from 0 to 800 με, the strain sensitivity of FPI1 is 0.5 pm/με and that of FPI2 is 1.13 pm/με. Based on the sensitivity difference of the two FPIs, fixing the sensitivity matrix allows for simultaneous strain and temperature measurements. In addition, the dual parameters may also be measured by tracking the phase variations corresponding to the two FPIs. The reported sensor offers a simple splicing process, easy manufacture, low cost, and stable performance and provides a reference for dual-parameter dynamic measurements.

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用波长和相位解调的级联光纤法布里-珀罗干涉仪对应变和温度的双重测定

摘要报道了一种采用级联光纤法布里-珀罗干涉仪（FPI）的应变和温度双参数测量装置，该装置采用带参数的波长解调和相位解调。单模光纤（SMF）、短长度的空心光纤（HCF）、一小段SMF和一根HCF拼接在一起，形成级联的FPI。在这种结构中，形成了两个主要干涉腔，并产生了两个FPI，它们是空气腔FPI和空气二氧化硅腔FPI。空气腔FPI和空气-二氧化硅腔FPI对应变或温度的敏感性不同，允许测量这两个参数。在波长解调方面，空气腔FPI（指定为FPI1）的温度灵敏度为1.39 pm/°C，空气二氧化硅空腔（指定为FPI2）的温度为8.56 25至85的pm/°C °C。在0至800με的应变范围内，FPI1的应变灵敏度为0.5 με，FPI2为1.13 pm/με。基于两个FPI的灵敏度差异，固定灵敏度矩阵可以同时测量应变和温度。此外，还可以通过跟踪与两个FPI相对应的相位变化来测量双参数。所报道的传感器具有简单的拼接工艺、易于制造、低成本和稳定的性能，为双参数动态测量提供了参考。

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

Instrumentation Science & Technology 工程技术-分析化学

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Instrumentation Science & Technology is an internationally acclaimed forum for fast publication of critical, peer reviewed manuscripts dealing with innovative instrument design and applications in chemistry, physics biotechnology and environmental science. Particular attention is given to state-of-the-art developments and their rapid communication to the scientific community. Emphasis is on modern instrumental concepts, though not exclusively, including detectors, sensors, data acquisition and processing, instrument control, chromatography, electrochemistry, spectroscopy of all types, electrophoresis, radiometry, relaxation methods, thermal analysis, physical property measurements, surface physics, membrane technology, microcomputer design, chip-based processes, and more. Readership includes everyone who uses instrumental techniques to conduct their research and development. They are chemists (organic, inorganic, physical, analytical, nuclear, quality control) biochemists, biotechnologists, engineers, and physicists in all of the instrumental disciplines mentioned above, in both the laboratory and chemical production environments. The journal is an important resource of instrument design and applications data.