Jul 2026· International Conference on Optical Communications and Networks· pp. 1-3· 0 citations· 8 references
Abstract
A highly sensitive gas pressure sensor based on the Vernier effect (VE) and Fabry-Perot interferometers (FPIs) has been proposed. The sensing structure was fabricated by fusion-splicing a single-mode fiber (SMF) with two quartz-capillary sections of different inner diameters, followed by coating a polydimethylsiloxane (PDMS) film on the end face of the terminal capillary. The experimental results show that the pressure sensitivities during the pressurization and depressurization processes were -431.4908 and -363.1582 nm/MPa,with linear fitting coefficients of 0.9902 and 0.9758, respectively. The difference between the two sensitivities is mainly attributed to the viscoelastic hysteresis of the PDMS film, delayed stress relaxation, incomplete elastic recovery, and experimental uncertainty. The results indicate that the proposed sensor has the advantages of compact size, relatively simple fabrication, high sensitivity, and favorable linear response, suggesting its potential for slight-pressure monitoring and pressure detection in confined spaces.
A high-sensitivity fiber-optic pressure sensor is demonstrated, based on the Vernier effect in a cascaded dual Fabry–Pérot interferometer. The sensor incorporates a 343 μm polarization-maintaining fiber and a single-mode fiber, precisely aligned and secured within a ceramic sleeve to form an air cavity. The Vernier eff...
Yue-Chen Wang, Chengju Ma, Xin Gong et al.· Journal of Optics· 0 citations
The strain sensors capable of high sensitivity and a wide measurement range in high-temperature environments are in urgent demand across numerous industrial fields. Herein, we propose an ultrahigh-sensitivity high-temperature strain sensor, which can simultaneously obtain temperature and strain signals. The Fabry–Pérot...
Hao-Yan Chai, Jian-Dong Bai, Yu-Jie Han et al.· IEEE Sensors Journal· 0 citations
In this paper, a small Fabry-Perot (F-P) acceleration sensor based on 45° fiber is proposed and implemented, which aims to realize high precision, high sensitivity and anti-interference vibration detection while realizing miniaturization packaging. Using beryllium bronze material and corrosion process, a micro elastic...
Hai-Jiao Zhao, Shuang Xiao, Lei Yu et al.· Global Intelligent Industry...· 0 citations
This study proposes a dual-parameter sensor for liquid level and temperature based on etched four-core fiber (FCF) structure. The sensor employs a square four-core fiber, and its interference mechanism superimposes both multimode interference (MMI) and Mach-Zehnder interference (MZI). Owing to the absence of a central...
A Vernier effect–based fiber-optic microcavity sensor is proposed for simultaneous temperature and humidity sensing. Using a sensing Fabry–Perot interferometer (FPI) with a UV-adhesive cavity and a reference air-cavity FPI in parallel, the Vernier effect amplifies spectral shifts. The sensor exhibits temperature sensit...
Wen-Wen Qian, Xin-Ying Lu, Shu-Qing Zhang et al.· International Conference on...· 0 citations
Skin humidity detection is a vital biomarker for monitoring human health and safety conditions. This study presented the development of a non-contact skin humidity sensor that utilizes an S-shaped optical fiber coated with polyimide and employs the Sagnac interferometric technique. To position the polyimide coating...
Lin Htein, Jing-Xian Cui, Chern Yang Leong et al.· Photonic Sensors· 0 citations
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