Curvature monitoring of power grid wires based on anti-resonant reflecting guidance in hollow core fibers

Zhao, Faqiang; Wang, Jianbo; Xiao, Yanxia; Zhang, Kun; Chen, Ran; Liu, Shuhui

doi:10.1016/j.ijleo.2020.164785

Cited by 10 publications

(6 citation statements)

References 26 publications

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“…One disadvantage of using a longer segment of CHCF is that the optical power suffers from higher losses. In the end, it is a tradeoff between the contrast of the lossy dips and signal attenuation, as many authors have been shown [ 24 , 34 , 35 ]. According to Equation (1), if

decreases the contrast of the lossy dips will be reduced, which can be achieved by starting to cover the outer part of CHCF by a liquid or a polymer.…”

Section: Principle Operation Fabrication Method and Experimentalmentioning

confidence: 99%

“…A dual parameter FOS for curvature and temperature was proposed by H. Cheng et al [33], demonstrating a curvature sensitivity of −4.28 dB/m −1 within a curvature range from 10.72 to 11.60 m −1 . F. Zhao et al [34] fabricated a curvature sensor for monitoring power grid wires, and its curvature sensitivity was 3.414 dB/m −1 in a range from 0 to 2.122 m −1 . It is important to highlight that the curvature sensitivity and the curvature range are two essential parameters to consider when designing FOS for curvature applications.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity Enhancement of Curvature Fiber Sensor Based on Polymer-Coated Capillary Hollow-Core Fiber

Herrera-Piad

Hernández-Romano

May-Arrioja

et al. 2020

Sensors

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In this paper, we propose and experimentally demonstrate a simple technique to enhance the curvature sensitivity of a bending fiber optic sensor based on anti-resonant reflecting optical waveguide (ARROW) guidance. The sensing structure is assembled by splicing a segment of capillary hollow-core fiber (CHCF) between two single-mode fibers (SMF), and the device is set on a steel sheet for measuring different curvatures. Without any surface treatment, the ARROW sensor exhibits a curvature sensitivity of 1.6 dB/m−1 in a curvature range from 0 to 2.14 m−1. By carefully coating half of the CHCF length with polydimethylsiloxane (PDMS), the curvature sensitivity of the ARROW sensor is enhanced to −5.62 dB/m−1, as well as an increment in the curvature range (from 0 to 2.68 m−1). Moreover, the covered device exhibits a low-temperature sensitivity (0.038 dB/°C), meaning that temperature fluctuations do not compromise the bending fiber optic sensor operation. The ARROW sensor fabricated with this technique has high sensitivity and a wide range for curvature measurements, with the advantage that the technique is cost-effective and easy to implement. All these features make this technique appealing for real sensing applications, such as structural health monitoring.

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decreases the contrast of the lossy dips will be reduced, which can be achieved by starting to cover the outer part of CHCF by a liquid or a polymer.…”

Section: Principle Operation Fabrication Method and Experimentalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement of Curvature Fiber Sensor Based on Polymer-Coated Capillary Hollow-Core Fiber

Herrera-Piad

Hernández-Romano

May-Arrioja

et al. 2020

Sensors

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show abstract

“…This causes the hollow part of the ber to expand, which leads to the deformation of the ber, thus affecting the experiment. Qi [19] prevents the hollow part from collapsing, weakly discharged, and manually mode several times during the fusion splicing process [21] . But this operation in question requires many manual adjustments and a lot of manual actions that are more accidental.…”

Section: Sensor Structure and Principle Analysismentioning

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.

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“…The cladding diameter of HCF and SMF are both 125 μm. To prevent collapse of the air hole, when splicing SMF and HCF by a commercial fusion splicer (ATOMOWAVE SFS-A60+), multiple weak discharges and manual mode were used in the splicing process [25]. The parameter setting of the splicer is shown in Table Ⅰ.…”

Section: Sensor Fabrication and Principlementioning

confidence: 99%

A Compact Fiber Cascaded Structure Incorporating Hollow Core Fiber With Large Inner Diameter for Simultaneous Measurement of Curvature and Temperature

Zhang

et al. 2022

IEEE Photonics J.

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A compact fiber cascaded structure for simultaneous measurement of curvature and temperature based on Fabry-Perot (FP) interference and anti-resonant (AR) mechanism is designed and experimentally demonstrated. The proposed structure is manufactured by sandwiching a segment of hollow core fiber (HCF) with large inner diameter and suitable length between two segments of single mode fibers (SMFs). Three sample sensors were fabricated with different HCF lengths. With theoretical analysis and experimental verifications, an HCF length of 1197 μm was selected for curvature and temperature experiments. The reflection fringes based on FP interference and transmission envelopes based on AR mechanism can be monitored to measure curvature and temperature variations at the same time. From experimental results, the sensitivities of curvature based on AR mechanism and FP interference are 0.2345 nm/m -1 and -0.1021 nm/m -1 , and those of sensitivities of temperature are 0.0172 nm/℃ and 0.0017 nm/℃, respectively. Therefore, the different responses in curvature and temperature based on two mechanisms enable the proposed structure to simultaneously measure curvature and temperature.

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Curvature monitoring of power grid wires based on anti-resonant reflecting guidance in hollow core fibers

Cited by 10 publications

References 26 publications

Sensitivity Enhancement of Curvature Fiber Sensor Based on Polymer-Coated Capillary Hollow-Core Fiber

Sensitivity Enhancement of Curvature Fiber Sensor Based on Polymer-Coated Capillary Hollow-Core Fiber

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

A Compact Fiber Cascaded Structure Incorporating Hollow Core Fiber With Large Inner Diameter for Simultaneous Measurement of Curvature and Temperature

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