All-Fiber Two-Dimensional Inclinometer Based on Bragg Gratings Inscribed in a Seven-Core Multi-Core Fiber

Cui, Jingxian; Gunawardena, Dinusha Serandi; Liu, Zhengyong; Zhao, Zhiyong; Tam, Hwa Yaw

doi:10.1109/jlt.2020.2974998

Cited by 29 publications

(8 citation statements)

References 18 publications

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“…It has the multiplexing function of transmitting multiple signals. In recent years, it has also been widely used in the field of sensor [16][17][18][19][20][21]. Zhou et al proposed a high temperature sensor based on a SCF Mach-Zehnder interferometer [16].…”

Section: Introductionmentioning

confidence: 99%

A hybrid interferometer sensor for simultaneous measurement of temperature and gas pressure based on tapered seven-core fiber and PDMS

Huang

Jiang

et al. 2023

Meas. Sci. Technol.

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A novel hybrid interferometer sensor composed of a tapered seven-core fiber (TSCF) and a polydimethylsiloxane (PDMS) cap at the end face of a TSCF is proposed for simultaneous measurement of temperature and gas pressure. TSCF forms a Michelson interferometer (MI), and the PDMS cap on the end surface of TSCF forms a Fabry-Perot interferometer (FPI). The sensing head consisted of a cascade of MI and FPI. When the external temperature or gas pressure changes, owing to the thermal effect or elastic deformation of PDMS, the interference spectrum of the FPI shifts significantly, so the FPI is very sensitive to temperature and gas pressure. MI, which is made of quartz optical fibers, is sensitive only to temperature and is not sensitive to gas pressure. The experimental results show that FPI has a temperature sensitivity of -0.22 nm/°C in the temperature range of 40 °C to 80 °C, and a gas pressure sensitivity of -2.27 nm/MPa in the gas pressure range of 0 to 0.3 MPa. MI has a temperature sensitivity of 0.05 nm/°C in the temperature range of 40 °C to 80 °C, and a gas pressure sensitivity of zero in the gas pressure range of 0 to 0.3 MPa. Using the temperature and gas pressure sensitivities of FPI and MI to construct a measurement matrix, it is possible to simultaneously measure temperature and gas pressure, eliminating their cross-sensitivity. This sensor has the comprehensive advantages of compact structure, small size, easy manufacturing, low cost, high reliability, and high sensitivity, and is expected to be applied in industrial practice.

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Section: Introductionmentioning

confidence: 99%

A hybrid interferometer sensor for simultaneous measurement of temperature and gas pressure based on tapered seven-core fiber and PDMS

Huang

Jiang

et al. 2023

Meas. Sci. Technol.

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“…Typically, optical fiber inclinometers consist of a fiber Bragg grating (FBG) [ 12 ], tilted fiber grating (TFG) [ 14 ] and long period fiber grating (LPFG) [ 15 ], etc. Besides, dislocation optical fibers [ 16 ] and multi-core optical fibers [ 17 ] are also used to manufacture inclinometers.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the high sensitivity of the polymer fiber, the temperature cross sensitivity and the cost of fabrication are fatal drawbacks. Tam et al proposed an all-fiber two-dimensional inclinometer based on a fiber Bragg grating (FBG) which can simultaneously measure azimuth and inclination [ 17 ]. However, its manufacturing process is complicated.…”

Section: Introductionmentioning

confidence: 99%

A Temperature Independent Inclinometer Based on a Tapered Fiber Bragg Grating in a Fiber Ring Laser

Lin

Zhou

Shao

et al. 2021

Sensors

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We demonstrate a new concept for an all-fiber inclinometer based on a tapered fiber Bragg grating (tFBG) in a fiber ring laser (FRL) with the capability of measuring the tilt angle and temperature simultaneously. The sensor performance is analyzed theoretically and investigated experimentally. The dependence of tilt angle on the spectral response in variable temperature conditions was measured. Two inclinometers with different lengths have been fabricated and characterized in FRL. The sensitivity is 0.583 dB/° and 0.849 dB/°, respectively, in the range of 0° to 90°. Thanks to the FRL system, narrow 3-dB bandwidth (<0.1 nm) and high optical signal-to-noise ratio (~60 dB) are achieved. The tFBG in the FRL system can be used for working as a temperature insensitive inclinometer. The results suggested that the proposed inclinometer has the advantages of compact size and convenient manufacture, enhancing its potential for application prospect.

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“…Therefore, angle sensors are developing in the threedimensional direction [27]- [30]. For example, Jingxian Cui et al [31] wrote FBG on the center core and two outer cores of the seven-core optical fiber, and observed the wavelength drift of each FBG during tilt to measure the angle. The detection range of azimuth angle is 0°360°, and the minimum measurement error is 0.0056°.…”

Section: Introductionmentioning

confidence: 99%

An Omni-Azimuth Angle Sensor for Tilt Measuring Based on FBG Array

Cao

Zhang

et al. 2021

IEEE Photonics J.

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An omni-azimuth angle sensor for tilt measuring based on fiber Bragg grating (FBG) array is proposed. It is designed based on the sensitivity of FBG to axial traction. The sensor consists of a mass block and a cube frame connected by an FBG array. The FBG array consists of four FBGs. When the sensor is tilted at different angles, the axial traction of each FBG will change due to the pull of the mass block. The tilt angle of the sensing unit can be obtained by calculating the magnitude and direction of the resultant traction of the four FBGs. The array design and measurement theory of the sensor are introduced, and the sensitivity of the sensor is discussed. Experimental results show that the FBG array can be used to measure the omni-azimuth angle. The angle sensitivity varies unevenly with the tilt angle and the range of variation is 0.08 nm/° to 0.4593 nm/°. Using the spectrometer with an accuracy of 0.01nm, the angle resolution ranges from 0.125° to 0.0218°. The array effectively extends the measurement range of the tilt sensor, and reduces the number of FBGs as much as possible on the basis of achieving omni-azimuth angle measurement.

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All-Fiber Two-Dimensional Inclinometer Based on Bragg Gratings Inscribed in a Seven-Core Multi-Core Fiber

Cited by 29 publications

References 18 publications

A hybrid interferometer sensor for simultaneous measurement of temperature and gas pressure based on tapered seven-core fiber and PDMS

A hybrid interferometer sensor for simultaneous measurement of temperature and gas pressure based on tapered seven-core fiber and PDMS

A Temperature Independent Inclinometer Based on a Tapered Fiber Bragg Grating in a Fiber Ring Laser

An Omni-Azimuth Angle Sensor for Tilt Measuring Based on FBG Array

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