用于低温环境下高灵敏度盐度和温度检测的二氧化钛改性SPR光纤传感器

IF 5.9 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Pengxiao Guo;Lei Zhang;Lu Wang;Sajid Ullah;Jianshe Li;Li Huo;Shuguang Li
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引用次数: 0

摘要

全球气候变化导致海洋盐度和温度大幅波动,特别是在高纬度地区,严重影响了自然生态系统和人类生产生活。这就对实时、精确的水文探测提出了更高的要求。本文利用不同厚度TiO2薄膜调制的ag基表面等离子体共振(SPR)光纤传感器,实现了宽温度范围($- 40~^{\circ}$ C ~ $100~^{\circ}$ C)和宽盐度范围(0% ~ 25%)两个参数的同时检测。用于盐度测量的Ag/薄层TiO2结构可以有效地提高盐感灵敏度和Ag膜的抗氧化性。用于温度测量的Ag/厚层TiO2/PDMS复合薄膜结构可以通过增强局部电场和提高等效RI来扩大折射率(RI)范围和测量范围。PDMS的集成可以提高探针在低温下的光谱响应和稳定性。级联探头结构可以在不同的工作波长下同时和可区分地测量两个参数。实验结果表明,最大盐度灵敏度为7.2 nm/%,最大温度灵敏度为12.8 nm/℃。本研究展示了利用半导体厚度调制来扩展SPR带宽并实现多参数同时感知的路径,避免了多材料结构集成的复杂性和应力开裂的风险。为今后在高海拔或复杂水环境下的原位水文探测提供了技术储备。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
TiO2-Modified SPR Fiber-Optic Sensor for High-Sensitivity Salinity and Temperature Detection in Low-Temperature Environments
Global climate change has led to significant fluctuations in ocean salinity and temperature, especially at higher latitudes, which have severely affected natural ecosystems and human production and life. This has placed higher demands on real-time and precise hydrological detection. This article utilizes Ag-based surface plasmon resonance (SPR) optical fiber sensors modulated by TiO2 films of different thicknesses to achieve simultaneous detection of two parameters within a wide temperature range ( $- 40~^{\circ }$ C to $100~^{\circ }$ C) and a wide salinity range (0%–25%). The Ag/thin-layer TiO2 structure used for salinity measurement can effectively enhance the sensitivity of salinity sensing and the oxidation resistance of the Ag film. The Ag/thick-layer TiO2/PDMS composite film structure used for temperature measurement can broaden the refractive index (RI) range and measurement range by enhancing the local electric field and improving the equivalent RI. The integration of PDMS can improve the spectral response and probe stability at low temperatures. The cascaded probe structure enables the simultaneous and distinguishable measurement of the two parameters at different working wavelengths. Experimental results show that the maximum salinity sensitivity is 7.2 nm/% and the maximum temperature sensitivity is 12.8 nm/°C. This study demonstrates the path of using semiconductor thickness modulation to expand the SPR bandwidth and achieve simultaneous sensing of multiple parameters, which avoids the complexity of multimaterial structure integration and the risk of stress cracking. It provides technical reserves for in situ hydrological detection in high-altitude or complex water environments in the future.
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来源期刊
IEEE Transactions on Instrumentation and Measurement
IEEE Transactions on Instrumentation and Measurement 工程技术-工程:电子与电气
CiteScore
9.00
自引率
23.20%
发文量
1294
审稿时长
3.9 months
期刊介绍: Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.
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