3-D Parallel Fiber Bragg Gratings Bending Sensor Based on Single-Channel Measurement

Wang, Hongye; Meng, Lingzhi; Xia, Qixun; Yang, Shitai; Yuan, Tingting; Zhang, Xiaolin; Yuan, Libo

doi:10.1109/jsen.2023.3243982

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…The FBG inscribing system includes a CCD for observing the core, which ensures that the FBG is accurately inscribed in the central core of the MCF. This step is crucial for the precise positioning of the FBG within the fiber core [ 30 , 31 ]. In the next step, the MCF is side-polished using the wheel side-polishing method, which includes a pair of fiber rotators and a pair of CCDs to adjust the core position and observe the remaining thickness of the fiber to ensure that the side core is just exposed.…”

Section: Operating Principle and Fabricationmentioning

confidence: 99%

Probe-Type Multi-Core Fiber Optic Sensor for Simultaneous Measurement of Seawater Salinity, Pressure, and Temperature

Feng,

Niu,

Wang

et al. 2024

Sensors

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In this article, we propose and demonstrate a probe-type multi-core fiber (MCF) sensor for the multi-parameter measurement of seawater. The sensor comprises an MCF and two capillary optical fibers (COFs) with distinct inner diameters, in which a 45° symmetric core reflection (SCR) structure and a step-like inner diameter capillary (SIDC) structure filled with polydimethylsiloxane (PDMS) are fabricated at the fiber end. The sensor is equipped with three channels for different measurements. The surface plasmon resonance (SPR) channel (CHSPR) based on the side-polished MCF is utilized for salinity measurement. The fiber end air cavity, forming the Fabry–Pérot interference (FPI) channel (CHFPI), is utilized for pressure and temperature measurement. Additionally, the fiber Bragg grating (FBG) channel (CHFBG), which is inscribed in the central core, serves as temperature compensation for the measurement results. By combining three sensing principles with space division multiplexing (SDM) technology, the sensor overcomes the common challenges faced by multi-parameter sensors, such as channel crosstalk and signal demodulation difficulties. The experimental results indicate that the sensor has sensitivities of 0.36 nm/‰, −10.62 nm/MPa, and −0.19 nm/°C for salinity, pressure, and temperature, respectively. As a highly integrated and easily demodulated probe-type optical fiber sensor, it can serve as a valuable reference for the development of multi-parameter fiber optic sensors.

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Section: Operating Principle and Fabricationmentioning

confidence: 99%

Probe-Type Multi-Core Fiber Optic Sensor for Simultaneous Measurement of Seawater Salinity, Pressure, and Temperature

Feng,

Niu,

Wang

et al. 2024

Sensors

Self Cite

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show abstract

“…Thus, Guan et al improved the fiber structure to reflect the bending in both directions from the spectrum [16] . Furthermore, a number of one-dimensional bending direction sensing units can be compactly integrated into a multicore fiber (MCF) to realize two-dimensional bending sensing [17,18] . Nevertheless, spectral information can only describe the wavelength of light, and it is easy to generate spectral overlap corresponding to multiple spatial vector directions, which is difficult to demodulate.…”

Section: Introductionmentioning

confidence: 99%

Multi-direction bending sensing based on spot pattern demodulation of dual-hole fiber

Li,

Liang,

Xie

et al. 2023

Chin. Opt. Lett.

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A multi-direction bending sensor based on spot pattern demodulation of a dual-hole fiber (DHF) is proposed. By using the interference and scattering in a DHF, the related multidirectional variations can be captured by the optical field. Furthermore, the multi-directional bending characteristics of the fiber are quantitatively described by the pattern of the output light spot, achieving multidirectional bending sensing. In addition, considering the subtle changes in the deformation patterns over time, a convolutional neural network (CNN) model based on deep learning is introduced for accurate recognition and prediction of the bending angle. The experimental results show that the sensor can perceive different bending angles in four directions. These outstanding results indicate that the multi-directional bending sensor based on dual-hole interference pattern decoding has potential applications in multi-directional quantitative sensing and artificial intelligence perception.

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Multiparameter Measurements for Bending, Torsion, and Temperature by Long-Period Gratings in Three-Core Fiber

Zhao,

Wang,

Peng

et al. 2024

IEEE Sensors J.

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3-D Parallel Fiber Bragg Gratings Bending Sensor Based on Single-Channel Measurement

Cited by 4 publications

References 31 publications

Probe-Type Multi-Core Fiber Optic Sensor for Simultaneous Measurement of Seawater Salinity, Pressure, and Temperature

Probe-Type Multi-Core Fiber Optic Sensor for Simultaneous Measurement of Seawater Salinity, Pressure, and Temperature

Multi-direction bending sensing based on spot pattern demodulation of dual-hole fiber

Multiparameter Measurements for Bending, Torsion, and Temperature by Long-Period Gratings in Three-Core Fiber

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