A partially PDMS-encapsulated microfiber Bragg grating for simultaneous temperature and strain measurement

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-03-10 DOI:10.1016/j.yofte.2025.104188

Guangxi Hu , Haimei Luo , Yuxian Zhang , Jiayu Zeng , Jiajia Zhao , Yanliang He , Xianping Wang , Wen Yuan

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Abstract

This paper proposes a sensor for simultaneously measuring temperature and strain using a microfiber Bragg grating (MFBG), half of which is coated with polymer polydimethylsiloxane (PDMS) and encapsulated inside a couple of U-shape glass grooves, while the other half is bare. Due to the different thermal-optic coefficient, elastic-optic coefficient, and cross section structural dimension, the two reflection bands from the encapsulated part of the MFBG and the bare MFBG section show different behaviors to temperature and strain. The sensitivity to temperature varies significantly between the two peaks, the reflection wavelength shifts in the opposite direction, capable of effectively detecting temperature variations. The strain is almost all concentrate on the bare MFBG (BMFBG) as the cross-sectional area of the encapsulated MFBG (EMFBG) is much larger than that of BMFBG. The experimental results show that the temperature sensitivities of −31.92 pm/°C and 10.31 pm/°C and strain sensitivities of ～0 pm/με and 6.24 pm/με are achieved, respectively. The sensor has the advantages of high sensitivity and simple structure and can measure strain and temperature simultaneously.

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.