Aug 2026· Fiber and integrated optics (Print)· Vol 45, pp. 345 - 363· 0 citations· 68 references
Abstract
ABSTRACT This article proposes an optical fiber sensor based on a high-performance Mach–Zehnder interferometer (MZI), using a piece of no-core fiber (NCF) spliced at both ends with single-mode fibers. Two attuned NCF pieces were adjusted to the dimensions of 30 µm and 60 µm in diameters, with lengths of 3 cm and 5 cm, respectively, to amplify the coupling efficiency via the effect of multi-mode interference. This sensor exhibited good sensitivity to acetone vapor monitoring with approximately 4.8004 × 10−5 dB/ppm. It demonstrated a low detection limit (LOD) of 207 ppm and a low drift of about 0.01284 dBm with high stability and good repeatability.
A cascaded single–mode–multimode–hollow-core fiber (SMF-MMF-HCF) optical sensor based on Fabry-Pérot interferometer (FPI) is proposed for ultra-sensitive copper ions (Cu(II)) detection. The cascaded structure provides an unfilled-air reference cavity and an air-material hybrid sensing cavity with slightly detuned free...
Jian-Bo Bao, Qiang Chen, Li-Ying Xu et al.· Journal of Lightwave Technol...· 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
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
Optical fiber curvature sensors based on Mach-Zehnder interferometers (MZI) incorporating multicore fibers offer high sensitivity. However, the influence of the beam splitter and combiner fibers on overall sensor performance remains underexplored. This work systematically investigates three seven-core fiber (SCF)-MZI c...
Nur Syafiqah Shamimi Mohd Zali, M. Salim, A. I. Azmi et al.· 2026 IEEE International Conf...· 0 citations
The application of optical fiber sensing structures based on plasmon regulation is hindered in high-precision detection scenarios by issues such as broad spectral full width at half maximum (FWHM), high energy loss, and intricate structural configurations. In this paper, an optical fiber sensing structure based on a Ta...
Rui-Zhe Zhang, Rui-Jie Tong, Bo-Tao Wang et al.· Optics Letters· 0 citations
The work presents two versions of a fiber-optic temperature sensor based on a cascade Fabry-Perot interferometer with enhanced sensitivity due to the optical Vernier effect. The version without an intermediate glass layer offers greater sensitivity gains but is more complex to manufacture compared to the version with a...
Timur A. Agliullin, A. Sakhabutdinov, Bulat I. Valeev· Optical Technologies for Tel...· 0 citations
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