Aug 2026· Measurement science and technology· Vol 37· 0 citations· 29 references
Physics
Abstract
This work demonstrates a highly sensitive fiber-optic current sensor based on a Mach–Zehnder interferometer. The sensing structure is fabricated by splicing a multimode fiber-no-core fiber-multimode fiber segment between two single-mode fibers, followed by successive coatings of ultraviolet (UV) glue and conductive silver adhesive to enable current response. Experimental results indicate that Sensor 2 exhibits a current-squared sensitivity as high as −145.1553 nm A−2 in the 0–0.32 A range, roughly 11.3 times higher than that of Sensor 1 without the UV glue coating. Temperature cross‐sensitivity is effectively eliminated through integration of a fiber Bragg grating. Owing to its high sensitivity, simple fabrication, low cost, and excellent repeatability and stability, the proposed sensor thus provides a practical and reliable solution for current monitoring in real‐world applications.
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, Cheng-Ju Ma, Xin Gong et al.· Journal of Optics· 0 citations
The interfacing of optical fibers with materials can lead to greater versatility for measurand detection. In this work, we spliced a single mode fiber to a section of a hollow core fiber. In this structure, a self-written waveguide was fabricated at the hollow core fiber tip using a UV curable polymer, resulting in mul...
João P. Santos, J. Bierlich, M. Nascimento et al.· EPJ Web of Conferences· 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
We report a liquid-level sensor based on the air-cladding-mode band of a 37.5° tilted fiber Bragg grating (TFBG). Partial immersion increases the radiative loss of this mode band, and the liquid level is retrieved from the integrated area between its fitted upper and lower spectral envelopes. The sensor exhibits a sens...
Jia-Hao Dong, Zhen-Cheng Li, Kai-Wei Li et al.· Optics Letters· 0 citations
The design of a temperature sensor employing the Mach–Zehnder configuration with an offset in the fiber core represents a novel methodology that leverages the distinctive attributes of optical fibers to attain enhanced sensitivity and precision in temperature measurement. Ambient temperature measurement is enabled by a...
M. Rico-Mendez, Romeo de Jesús Selvas-Aguilar, Ricardo Chapa-Garcia et al.· Photonics· 0 citations
To overcome the limitation of the evanescent field enhancement efficiency in singlemicrostructure optical fibers, this paper designs a tapered-U-shaped evanescent fieldenhanced(TU-EFE) optical fiber probe based on the principle of field-synergistic enhancement and qualitatively analyzes the coupling enhancement mecha...
