Fabrication and Characterization of Seawater Temperature Sensor with Self-Calibration Based on Optical Microfiber Coupler Interferometer

Lingjun Zhou; Yang Yu; Liang Cao; Huimin Huang; Yuyu Tao; Zhenfu Zhang; Jianfei Wang; Junbo Yang; Zhenrong Zhang

doi:10.3390/app10176018

Applied Sciences (Aug 2020)

Fabrication and Characterization of Seawater Temperature Sensor with Self-Calibration Based on Optical Microfiber Coupler Interferometer

Lingjun Zhou,
Yang Yu,
Liang Cao,
Huimin Huang,
Yuyu Tao,
Zhenfu Zhang,
Jianfei Wang,
Junbo Yang,
Zhenrong Zhang

Affiliations

Lingjun Zhou: Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronic and Information, Guangxi University, Nanning 530004, China
Yang Yu: Center of Material Science, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
Liang Cao: Deep Sea Technology Laboratory, College of Meteorology and Oceanology, National University of Defense Technology, Changsha 410073, China
Huimin Huang: Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronic and Information, Guangxi University, Nanning 530004, China
Yuyu Tao: Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronic and Information, Guangxi University, Nanning 530004, China
Zhenfu Zhang: Center of Material Science, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
Jianfei Wang: Deep Sea Technology Laboratory, College of Meteorology and Oceanology, National University of Defense Technology, Changsha 410073, China
Junbo Yang: Center of Material Science, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
Zhenrong Zhang: Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronic and Information, Guangxi University, Nanning 530004, China

DOI: https://doi.org/10.3390/app10176018
Journal volume & issue: Vol. 10, no. 17
p. 6018

Abstract

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In this paper, a novel high-sensitivity temperature sensor with two sensing regions based on optical microfiber coupler interferometer (OMCI) for ocean application is proposed. The OMCI sensor is constructed by connecting Faraday mirrors to the two ports of the microfiber coupler respectively. Its sensing characteristics analysis and experimental test are conducted. Using a broad-spectrum light source as input light, temperature sensor demodulation can be implemented by tracking the drift of the characteristic wavelength (dip wavelength or peak wavelength) of the reflection spectrum. Experimental results show that the temperature sensitivity of the OMCI sensor can reach 1007.4 pm/°C and the detection dynamic range up to 17.6 °C. Besides, due to the two sensing regions in OMCI, self-calibration of seawater temperature sensing and optimization of multi-parameter cross-sensitive demodulation are performed by affecting the non-equal-arm interferometer through a specific package design of the external environment. The sensor has the advantages of high sensitivity, large dynamic range, small size, easy to manufacture, which will play an important role in the practical application of marine environment monitoring.

Published in Applied Sciences

ISSN: 2076-3417 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General); Science: Biology (General); Science: Physics; Science: Chemistry
Website: http://www.mdpi.com/journal/applsci

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