Temperature-Insensitive Curvature Sensor With Plane-by-Plane Inscription of Off-Center Tilted Bragg Gratings in CYTOP Fibers

Leal‐Junior, Arnaldo; Theodosiou, Antreas; Biazi, Vitorino; Macedo, Leandro; Marques, Carlos; Kalli, Kyriacos; Frizera, Anselmo

doi:10.1109/jsen.2022.3171039

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…At the same time, only cutting and welding techniques are required in manufacturing, so the cost is low. Compared with the grating writing techniques [8], [15], expensive lasers and precise alignment techniques are not required. In addition, compared with the fused polymer optical fiber [14], the used optical fiber can be easily obtained and does not need to be damaged by the fiber fusing.…”

Section: Curvature Magnitude and Orientation Angle Reconstructionmentioning

confidence: 99%

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Temperature-Insensitive Two-Dimensional Vector Bending Sensor Based on Fabry-Pérot Interferometer Incorporating a Seven-Core Fiber

Zhang

et al. 2022

IEEE Photonics J.

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We proposed and experimentally demonstrated a temperature-insensitive two-dimensional (2D) vector bending sensor on the basis of Fabry-Pé rot Interferometer (FPI). The sensor is fabricated by splicing a section of silica capillary optical fiber (COF) between a trench-assisted seven-core fiber (SCF) and a multimode fiber (MMF). For orientation angle from 0° to 360°, the vector bending responses of six outer-core FPIs were studied at a step of 30°. From experimental results, the proposed sensor exhibits strong bending-direction dependence, and the maximum sensitivity is 200.6 pm/m −1 . The curvature magnitude and orientation angle can be reconstructed through the dip wavelength shifts of any two off-diagonal outer-core FPIs. Hence, there are 12 various combinations from six outer-core FPIs, and the average value can be taken in multiple reconstructions to develop exact 2D vector bending measurement. For curvature magnitude and orientation angle reconstructed, the average relative error is 6.2% and 3.3%, respectively. In addition, experiments verified the proposed sensor is insensitive to ambient temperature changes.

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Section: Curvature Magnitude and Orientation Angle Reconstructionmentioning

confidence: 99%

“…Polymer optical fibers used as curvature sensors have also been investigated [14]. In addition, an off-centered TFBG inscribed in cyclic transparent optical polymer (CYTOP) fiber as a curvature sensor have been studied [15]. Some of the curvature sensors were based on intensity modulation [14].…”

Section: Introductionmentioning

confidence: 99%

Temperature-Insensitive Two-Dimensional Vector Bending Sensor Based on Fabry-Pérot Interferometer Incorporating a Seven-Core Fiber

Zhang

et al. 2022

IEEE Photonics J.

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“…The assets of POFs, such as a large core and simple connection, may offer a cost-effective solution for the inhome network. Polymethyl methacrylate (PMMA) [4,5], polydimethylsiloxane (PDMS) [6,7], polystyrene (PS) [8,9], polycarbonate (PC) [10,11], perfluorinated polymer (CYTOP ® ) [12,13], cycloolefin polymer (ZEONEX ® ) [14,15], and cycloolefin copolymer (TOPAS ® ) [16,17] are just a few of the materials used to fabricate POFs. Due to the flexibility of POF material, it is feasible to produce POFs that meet the requirements of various applications by using alternative specifications or materials.…”

Section: Introductionmentioning

confidence: 99%

Wavelength dependent transmission in multimode graded-index microstructured polymer optical fibers

Simović,

Savović,

Wang

et al. 2024

Front. Phys.

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Up to now, there have been no commercial simulation tools accessible for researching the transmission properties of multimode microstructured optical fibers (MOFs). In order to avoid this problem, this study uses the time-independent power flow equation (TI PFE) numerical solution to examine the wavelength dependency of the equilibrium mode distribution (EMD) and steady state distribution (SSD) in multimode graded-index microstructured polymer optical fibers (GI mPOF) with a solid core. We showed that the lengths zs at which an SSD is obtained in GI mPOF and the coupling length Lc necessary to create an EMD are shorter at λ = 568 nm than they are found to be at λ = 633 nm. The lengths Lc and zs stay constant when the wavelength decreases further from λ = 568 to 522 and then to 476 nm. As a result, it is anticipated that a faster bandwidth enhancement in the tested GI mPOF will take place at wavelengths around λ = 568 nm as opposed to λ = 633 nm. Such a bandwidth improvement is not brought about by additional wavelength reduction. The study’s findings can be used in communication and sensory systems that use multimode GI mPOFs at different wavelengths.

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“…At present, fiber bending sensors are generally divided into the grating type and the interferometer type. It is known that the fiber Bragg gratings (FBGs) have been extensively employed in bending sensing due to their high accuracy and high sensitivity when the narrowband reflection spectrum changes with the varied grating period [ 9 , 10 ]. In addition, multiple FBGs can also be deployed simultaneously for wavelength-division multiplexing (WDM) or time-division multiplexing (TDM) configurations to improve the signal capacity for sensing.…”

Section: Introductionmentioning

confidence: 99%

Multicore Fiber Bending Sensors with High Sensitivity Based on Asymmetric Excitation Scheme

Suo

Peng

Chen

2022

Sensors

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Bending sensing was realized by constructing a tapered four-core optical fiber (TFCF) sensor. The four-core fiber (FCF) between the fan-in and fan-out couplers was tapered and the diameter became smaller, so that the distance between the four cores arranged in a square became gradually smaller to produce supermodes. The two ends of the TFCF were respectively connected to the fan-in and fan-out couplers so that the individual cores in the FCF could link to the separate single-mode fibers. A broadband light source (superluminescent diodes (SLD)) spanning 1250–1650 nm was injected into any one of the four cores, and the orientation was thus determined. In the tapering process, the remaining three cores gradually approached the excitation core in space to excite several supermodes based on the tri-core structure first, and then transited to the quadruple-core structure. The field distributions of the excited supermodes were asymmetric due to the corner-core excitation scheme, and the interference thus resulted in a higher measurement sensitivity. When the diameter of the TFCF was 7.5 μm and the tapered length was 2.21 mm, the sensitivity of the bending sensor could reach 16.12 nm/m−1.

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Temperature-Insensitive Curvature Sensor With Plane-by-Plane Inscription of Off-Center Tilted Bragg Gratings in CYTOP Fibers

Cited by 6 publications

References 35 publications

Temperature-Insensitive Two-Dimensional Vector Bending Sensor Based on Fabry-Pérot Interferometer Incorporating a Seven-Core Fiber

Temperature-Insensitive Two-Dimensional Vector Bending Sensor Based on Fabry-Pérot Interferometer Incorporating a Seven-Core Fiber

Wavelength dependent transmission in multimode graded-index microstructured polymer optical fibers

Multicore Fiber Bending Sensors with High Sensitivity Based on Asymmetric Excitation Scheme

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