A Vector Bending Sensor Based on a Core-Offset Long Period Fiber Grating Induced by an Arc-Discharge

Xu, Xia; Lu, Chupeng; Jin, Xiren; Lv, Mingyang; Sun, Cuiting; Yan, Qi; Zhang, Shuo; Wang, Jiabin; Rui, Zeju; Xiang, Zihang; Geng, Tao; Sun, Weimin; Yuan, Libo

doi:10.1109/jsen.2021.3112735

Cited by 10 publications

(2 citation statements)

References 28 publications

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“…There are many methods to fabricate LPFG, such as femtosecond lasers writing [25,26], arc inducing [27,28], ultraviolet (UV) exposure [29][30][31] and CO 2 laser writing [32,33], in which UV exposure with an amplitude mask is the most widely used and effective method to fabricate LPFG working near DTP. In 2017, Janczuk-Richter et al proposed a LPFG virus sensor based on hydrogen-loaded SMF-28 fiber by KrF excimer laser [29].…”

Section: Introductionmentioning

confidence: 99%

A Seawater Salinity Sensor Based on Optimized Long Period Fiber Grating in the Dispersion Turning Point

Zhao

Wang

et al. 2023

Sensors

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Variations of seawater salinity often cause ocean internal waves, water masses and stratification, which affect the stability of the ocean environment. Therefore, the study of seawater salinity is significant for the prediction of changes in the ocean environment. However, existing methods for measuring seawater salinity generally have the disadvantages of low sensitivity and low accuracy. In this work, we proposed a seawater salinity sensor based on long period fiber grating (LPFG) in the dispersion turning point (DTP), which has demonstrated the possibility to fabricate LPFG with a shorter grating period by CO2 laser in a thin single mode fiber (SMF) of 80 μm cladding diameter without etching. For obtaining higher sensitivity that could meet the measurement requirement in practice, the proposed sensor was optimized by combining etching cladding and DTP. After the LPFG working near DTP was fabricated by a CO2 laser, the cladding diameter was reduced to 57.14 μm for making cladding mode LP1,7 work near DTP by hydrofluoric acid (HF) solutions. The experimental results have demonstrated that a sensitivity of 0.571 nm/‰ can be achieved when the salinity increases from 5.001‰ to 39.996‰, and the sensor shows good repeatability and stability. Based on its excellent performance, the optimized LPFG is a prospective sensor to monitor seawater salinity in real time. Meanwhile, a low-cost way was provided to make LPFG work near DTP instead of ultraviolet exposure and femtosecond laser writing.

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Section: Introductionmentioning

confidence: 99%

A Seawater Salinity Sensor Based on Optimized Long Period Fiber Grating in the Dispersion Turning Point

Zhao

Wang

et al. 2023

Sensors

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“…For the first time, to the best of our knowledge, this kind of sensor is exploited for high curvature measurement. The ultrathin platform allows to reduce the stress at surface and, thus, the possibility to extend the limited curvature measurement range of cylindrical optical fibers [20], [34]- [37], without the use of soft materials [1], [38]. The proposed flexible planar sensors, with an off-axis core, also overcomes the limit of cylindrical optical fibers, which require that the orientation with respect to the curvature direction is guaranteed for an efficient onedimensional curvature sensing.…”

mentioning

confidence: 99%

Effects of Curvature on Flexible Bragg Grating in Off-Axis Core: Theory and Experiment

Anelli

Annunziato

Godfrey

et al. 2023

J. Lightwave Technol.

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A high curvature flexible Bragg grating, in planar technology, is designed, fabricated and experimentally characterized by employing silica glass. The curvature sensing mechanism for slightly off-axis core is theoretically explained and experimentally demonstrated. The electromagnetic behavior of the proposed sensor is investigated through conformal mapping, modal analysis, and coupled-mode theory. The experimental measurement reveals different sensitivities to positive and negative curvatures. The reflection spectrum of the planar Bragg grating sensor and the relationship between its resonant wavelengths and the curvature is measured for a large curvature range up to 𝟏/𝑹 = ± 𝟑𝟑𝒎 −𝟏 . The interest toward off-axis core on planar flexible platform for curvature monitoring is due to the lateral stiffness and low Young's modulus of the substrate.

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Temperature-insensitive vector curvature sensor based on four-core fiber offset structure

Li,

Yu,

Ling

et al. 2024

Infrared Physics & Technology

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A Vector Bending Sensor Based on a Core-Offset Long Period Fiber Grating Induced by an Arc-Discharge

Cited by 10 publications

References 28 publications

A Seawater Salinity Sensor Based on Optimized Long Period Fiber Grating in the Dispersion Turning Point

A Seawater Salinity Sensor Based on Optimized Long Period Fiber Grating in the Dispersion Turning Point

Effects of Curvature on Flexible Bragg Grating in Off-Axis Core: Theory and Experiment

Temperature-insensitive vector curvature sensor based on four-core fiber offset structure

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