Sensitivity optimization of symmetric multi-core fiber strain sensor based on mode-coupling theory

Tang, Zijuan; Lou, Shuqin; Wang, Xin; Huang, Bingsen; Wang, Mingqing; Sheng, Xinzhi

doi:10.1016/j.infrared.2020.103517

Cited by 5 publications

(4 citation statements)

References 29 publications

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“…The structure showed good guidance in the 1500 to 1600 nm spectral range of interest. As a result, 6 μm diameter cores with a core-to-core pitch of 18 μm were achieved, in agreement with [10]. The difference between the both lied exclusively in the arrangement of their cores.…”

Section: Sensor Design and Experimental Setupsupporting

confidence: 81%

“…1 (c). The operating principle of each sensor is based on the reduction in core diameter and core-to-core pitch with its elongation, which results in a change of the coupling coefficient and a shift of the wavelength dip in transmission spectrum [10]. In order to characterize this strain dependency, the fiber was attached to a motorized custom station equipped with two opposing clamps with a spacing that can be controlled with a minimum step of 17 nm.…”

Section: Sensor Design and Experimental Setupmentioning

confidence: 99%

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Multicore fiber sensors for strain measurement towards traffic monitoring

Sanchez-Gonzalez,

Pradas,

Corera

et al. 2023

European Workshop on Optical Fibre Sensors (EWOFS 2023)

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In this work, two new interferometric sensors based on multicore optical fibers for the measurement of strain with the ultimate goal of traffic monitoring are presented. The operating principle of each sensor relied on the monitoring of the phase shift difference accumulated between the supermodes of the structure of the multicore segment in a full round trip. The strain characterization for both sensors resulted in a linear response, with sensitivities of -4.073·10-3 rad/μ and - 4.389·10-3 rad/μ for the aligned and V-shaped cases respectively, and one-hour instabilities below 4.6·10-3 rad with a 95% confidence level. These results suggest its feasibility in applications requiring high sensitivities over very wide strain ranges, such as heavy-vehicle traffic monitoring. To corroborate the hypothesis, both sensors were integrated into the pavement and their response to the traffic was analyzed.

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Section: Sensor Design and Experimental Setupsupporting

confidence: 81%

Section: Sensor Design and Experimental Setupmentioning

confidence: 99%

Multicore fiber sensors for strain measurement towards traffic monitoring

Sanchez-Gonzalez,

Pradas,

Corera

et al. 2023

European Workshop on Optical Fibre Sensors (EWOFS 2023)

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show abstract

“…On the one hand, the interrogation system allows for multiplexing, optimizing the spectral efficiency of the sensors, interrogating them individually and using devices with similar or even identical spectra, as they are identified by their and not by the shape of their spectra. On the other hand, MCFs provide several intrinsic advantages such as high sensitivity, ease of interrogation, possibility to design ad-hoc geometries to optimize their sensitivity for the measurement of certain parameters 36 , 37 , etc. Thus, the potential benefits of the combination of the proposed interrogation system with MCFs are of big interest for multipoint sensing systems.…”

Section: Operational Mechanism and Experimental Setupmentioning

confidence: 99%

“…2 b, which was used as sensor head in this work, when a broadband light is launched into the central core of the TCF and analyzed at its exit by a spectrometer, a series of maxima and minima appear in the spectrum. However, when the same SMF-TCF-SMF structure is interrogated in reflection 21 , 27 , 36 , 37 , the light travels back and forth through it and the normalized coupled power at the output becomes: …”

Section: Operational Mechanism and Experimental Setupmentioning

confidence: 99%

Twin-core fiber sensor integrated in laser cavity

Amorebieta

Pereira

Durana

et al. 2022

Sci Rep

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In this work, we report on a twin-core fiber sensor system that provides improved spectral efficiency, allows for multiplexing and gives low level of crosstalk. Pieces of the referred strongly coupled multicore fiber are used as sensors in a laser cavity incorporating a pulsed semiconductor optical amplifier (SOA). Each sensor has its unique cavity length and can be addressed individually by electrically matching the periodic gating of the SOA to the sensor’s cavity roundtrip time. The interrogator acts as a laser and provides a narrow spectrum with high signal-to-noise ratio. Furthermore, it allows distinguishing the response of individual sensors even in the case of overlapping spectra. Potentially, the number of interrogated sensors can be increased significantly, which is an appealing feature for multipoint sensing.

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A sandwich structure on Grapefruit microstructured fiber for measurement of non-coaxial torsion

Jin

Wang

et al. 2023

Optical Fiber Technology

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Sensitivity optimization of symmetric multi-core fiber strain sensor based on mode-coupling theory

Cited by 5 publications

References 29 publications

Multicore fiber sensors for strain measurement towards traffic monitoring

Multicore fiber sensors for strain measurement towards traffic monitoring

Twin-core fiber sensor integrated in laser cavity

A sandwich structure on Grapefruit microstructured fiber for measurement of non-coaxial torsion

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