Stress-insensitive vector curvature sensor based on a single fiber Bragg grating

Zhu, Fuxing; Zhang, Yundong; Qu, Yingdong; Jiang, Wanshun; Su, Huaiyin; Guo, Ying; Qi, Kaiyue

doi:10.1016/j.yofte.2019.102133

Cited by 34 publications

(13 citation statements)

References 23 publications

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“…Through the coefficient matrix method, the sensor achieves doubleparameter measurement with a highly reproducible technique and high sensitivity. By fusion splicing optical fibers, better interference effect and measurement results were obtained, and the fabrication process is much simpler and more stable than those previously reported [9,13,15].…”

Section: Introductionmentioning

confidence: 84%

“…Optical fiber sensors have attracted more and more attention due to their inherent advantages such as simple structure, easy implementation, high sensitivity, chemical corrosion resistance, and are not easily affected by electromagnetic interference [1]. Furthermore, optical fiber sensors have been successfully used in monitoring physical quantities, such as temperature [2], strain [3], pressure [4], rotation [5], magnetic field [6], refractive index (RI) [7], relative humidity [8], and curvature [9][10][11][12][13][14]. The bending curvature of the structure is an important parameter for measuring the deformation of the object, and it is also an important optical parameter for optical fiber sensor.…”

Section: Introductionmentioning

confidence: 99%

“…However, the tapered fibers are fragile, and the overall size of the tapered sensors can limit its application in the micro-environment. Zhu et al [13] proposed a vector curvature sensor based on a single FBG. Its curvature sensitivities were 553.65 and −811.19 pm/m −1 under convex and concave bending.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous Measurement of Curvature and Temperature Based on a Simple Cascaded Fiber Interferometer

Wang¹,

Lu²,

Liu³

2022

PIER M

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An optical fiber sensor based on thin-core fiber (TCF) and no-core fiber (NCF) interference structures is presented and experimentally demonstrated to measure the curvature and temperature. The fabrication process of the sensor is simple and convenient, and the sensing part is formed by cascading a TCF and an NCF between two single-mode fibers. The dips at resonant wavelengths are generated in the optical transmission spectrum owing to mode interference. The experimental results indicate that an optical curvature sensitivity of −5.76 nm/m −1 is achieved in the linear range of 0.9895-3.2817 m −1 and that a temperature sensitivity of 0.18 nm/ • C is obtained in the temperature range of 25-55 • C. Additionally, the cross sensitivity problem is solved using the coefficient matrix measurement method, and the cross-sensitivity is as low as 0.0312 m −1 / • C. Therefore, the sensor exhibits a highly reproducible technique and low cross sensitivity, which has a wide range of application prospects in the accurate measurement of mechanical arms and structural health monitoring.

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Simultaneous Measurement of Curvature and Temperature Based on a Simple Cascaded Fiber Interferometer

Wang¹,

Lu²,

Liu³

2022

PIER M

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“…Under a bending condition, the outer and inner region of the optical fiber (OF) will experience tensile and compressive stress, respectively. The induced stress will modify the OF refractive index (RI) distribution via stress-optic effects [37], and this can disturb the guiding properties of the fiber. For instance, bending will modify the shape of the guided mode that effectively moves toward the outer region of the OF, which will increase the losses of the guided mode [38][39][40].…”

Section: Operation Principlementioning

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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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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“…The holographic grating is an optical device of interest to researchers in which the fringe pattern of two beams interference is used to fabricate the grating [1][2][3] and the application of holographic grating have been presented [4][5][6]. One fabrication method of holographic grating the interference of two beams generated by computer programming [7][8] and transferred onto a photoresist film.…”

Section: Introductionmentioning

confidence: 99%

Dry film holographic grating based on computer-generated mask lithography

Inneam

Khlayboonme

Kitiwan

et al. 2022

Optical Manipulation and Structured Materials Conference (OMC 2022)

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This paper presented an alternative technique for fabricating the dry film holographic grating based on a mask generated by computer simulation and experimental results. The mask was generated by a fringe pattern which is created by the mathematical model of two beams interference with various angles. Computer simulation of the fringe pattern was printed on film, i.e., the holographic grating mask. The mask was attached on dry film and then illuminated by UV light, where the lithography technique was applied. According to the lithography technique, the computer-generated holographic grating mask was transferred to dry film. After fabrication, fringe patterns obtained from the grating were observed. Then, the grating period was analyzed and confirmed by Scanning Electron Microscope (SEM). Experimental results show that the method could apply to fabricate the dry film holographic grating.

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Stress-insensitive vector curvature sensor based on a single fiber Bragg grating

Cited by 34 publications

References 23 publications

Simultaneous Measurement of Curvature and Temperature Based on a Simple Cascaded Fiber Interferometer

Simultaneous Measurement of Curvature and Temperature Based on a Simple Cascaded Fiber Interferometer

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

Dry film holographic grating based on computer-generated mask lithography

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