Electric current measurement using fiber-optic curvature sensor

Di, Haiting; Xin, Ying; Sun, Shi-Hai

doi:10.1016/j.optlaseng.2015.07.009

Cited by 14 publications

(5 citation statements)

References 22 publications

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“…With this situation, the ray is capable of propagating through the sensing part. If θ represents the angle that a guided ray makes with the normal to the core-cladding interface in the straight fiber, then the corresponding angle φ at the outer surface of the bent-core is given by the expression done by [11][12][13]: (4) where h is the distance at which the ray is incident on the entrance of fiber from the core-cladding boundary B is the bending radius, and w is the waveguide width. Similarly, angle δ of the ray at the inner surface of the bent-core is given by: (5) Fig.…”

Section: Propagation Of Light For the U-shape Or Half Turn Of The Ellipse Shapementioning

confidence: 99%

“…Macro-and micro-bending designs are design configurations that can provide effective loss control mechanism in fiber bending sen-sors. Numerous fiber bending sensors have been proposed to measure different physical parameters such as voltage, pressure, strain, temperature [3][4][5]. At present, the bending loss mechanism is being used in wearable sensors for respiration and heartbeat detection.…”

Section: Introductionmentioning

confidence: 99%

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Bend loss fiber optics design based on sinusoidal and ellipse configurations

Arif¹,

Burhanuddin²,

Shaari³

et al. 2021

Optica Applicata

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Bending losses in optical fibers comprise one of the extrinsic attenuations that contribute to optical loss and they are essential for optical fiber bending sensor applications. This work investigated the optical loss in a standard single-mode step-index fiber optics due to fiber bending at 1550 nm wavelength. Variations in macro-bending loss with curvature radius and turn number have been measured. Curvature radius and turn number are examined for sinusoidal and elliptical shaped bending configurations. It has been found that the loss increases as the bending radius and number of turns increase. The result also showed that elliptical shaped bending configuration produced more loss in contrast to that of sinusoidal shaped at bending angles of 180° and 360°. The study on the macro-bending loss in terms of curvature radius and turn number for both elliptical and sinusoidal shaped bending configurations is beneficial for future fiber optic sensor applications.

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Section: Propagation Of Light For the U-shape Or Half Turn Of The Ellipse Shapementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bend loss fiber optics design based on sinusoidal and ellipse configurations

Arif¹,

Burhanuddin²,

Shaari³

et al. 2021

Optica Applicata

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show abstract

“…Curvature measurement plays more and more important role in practical engineering applications, such as structural health monitoring [1] , civil engineering [2] , and aerospace [3] . The traditional electromagnetic sensors based on electrical/magneto-resistive effect are susceptible to environmental corrosion and electromagnetic interference [4,5] , which largely limits the demands of compact and in-suit curvature sensing applications. Due to the desirable advantages of high sensitivity, compact structure, lightweight, anti-electromagnetic interference, corrosion resistance, and independence of the environment [6,7] , the ber-optical sensor has been extensively investigated in curvature detection.…”

Section: Introductionmentioning

confidence: 99%

Temperature–insensitive curvature sensor based on hollow-core fiber assisted microbubble Mach–Zehnder interferometer

Chen,

Su,

Gong

et al. 2024

Appl. Phys. B

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A compact ber-optical curvature sensor based on the hollow-core ber (HCF) assisted microbubble Mach-Zehnder interferometer (HMZI) is proposed and experimentally demonstrated. Transmission spectral characteristics of the proposed curvature sensor have been investigated with a maximum intensity-interrogated sensitivity of -1.48 dB/m − 1 in a curvature range from 1.22 m − 1 to 3.46 m − 1 . The temperature-induced instability is measured below 0.30 dB in a large temperature range of 35°C to 60°C, suggesting a good temperature resistance performance. The overall sensing size is controlled to be around 600 µm. Hence, the HMZI curvature sensor has several desirable merits such as wide measurement range, temperature insensitivity, and ease of integration, which make it a promising candidate in curvature-related mechanical engineering and structural health monitoring applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Temperature insensitive curvature sensor based on hollow-core fiber assisted microbubble Mach-Zehnder interferometer

Chen,

Su,

Gong

et al. 2023

Preprint

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A compact fiber-optical curvature sensor based on the hollow-core fiber (HCF) assisted microbubble Mach-Zehnder interferometer (HMZI) is proposed and experimentally demonstrated. Transmission spectral characteristics of the proposed curvature sensor have been investigated with a maximum intensity-interrogated sensitivity of -1.48 dB/m− 1 in a curvature range from 1.22 m− 1 to 3.46 m− 1. The temperature-induced instability is measured below 0.30 dB in a large temperature range of 35°C to 60°C, suggesting a good temperature resistance performance. The overall sensing size is controlled to be around 600 µm. Hence, the HMZI curvature sensor has several desirable merits such as wide measurement range, temperature insensitivity, and ease of integration, which make it a promising candidate in curvature-related mechanical engineering and structural health monitoring applications.

show abstract

Electric current measurement using fiber-optic curvature sensor

Cited by 14 publications

References 22 publications

Bend loss fiber optics design based on sinusoidal and ellipse configurations

Bend loss fiber optics design based on sinusoidal and ellipse configurations

Temperature–insensitive curvature sensor based on hollow-core fiber assisted microbubble Mach–Zehnder interferometer

Temperature insensitive curvature sensor based on hollow-core fiber assisted microbubble Mach-Zehnder interferometer

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