Interrogation a Fiber Bragg Grating vibration sensor by narrow line width light

Chang, Jun; Huo, Dianheng; Ma, L.; Liu, Xiaohui; Liu, Tongyu; Wang, Chang

doi:10.1109/apos.2008.5226319

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…This kind of interrogation scheme uses a FBG with relatively broader transmission spectrum (comparing with the bandwidth of light source) as the tilt filter (Campopiano et al , 2009; Chang et al , 2008). The central wavelength of the narrowband light (i.e.…”

Section: Comparison Of the Sensing Characteristics Of Fbg And Tfbgmentioning

confidence: 99%

A comparison study of the sensing characteristics of FBG and TFBG

Jiang

2013

Sensor Review

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Purpose -The purpose of this paper is to compare the sensing characteristics of uniform fiber Bragg grating (FBG) and tilted fiber Bragg grating (TFBG) by presenting a detailed research review. Temperature, axial strain, bending, vibration and refractive index measurands of FBG and TFBG sensor are presented and some significant differences are found. Design/methodology/approach -Theoretical analysis and practical application in engineering are investigated and compared from other authors' research papers and self analysis. Spectra behavior of both FBG and TFBG are discussed. Findings -There are found to be significant differences in temperature, axial strain, bending, vibration and refractive index sensing characteristics of FBG and TFBG. Originality/value -The paper's analysis is comprehensive and clear and provides readers with the sensing characteristics of FBG and TFBG in detail.

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Section: Comparison Of the Sensing Characteristics Of Fbg And Tfbgmentioning

confidence: 99%

A comparison study of the sensing characteristics of FBG and TFBG

Jiang

2013

Sensor Review

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“…When the wavelength of the FBG sensor changes λ due to strain, the reflectivity changes s, so the change in light intensity is I in s [7]. In the measuring range, λ is relatively small.…”

Section: Working Principle and Interrogation Systemmentioning

confidence: 99%

A micro-seismic fiber Bragg grating (FBG) sensor system based on a distributed feedback laser

Wang¹,

Liu²,

Wang³

et al. 2010

Meas. Sci. Technol.

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In this work a micro-seismic fiber Bragg grating (FBG) sensor system based on a narrow linewidth distributed feedback (DFB) laser is investigated. By automatic control of the temperature of the DFB laser, the wavelength of the laser can be locked in the −3 dB reflectivity spectrum of the FBG. So the FBG sensor system can be made immune to temperature. Using the reference channel, the measurement precision of the system is improved by wiping out the power noise of the DFB laser. Experiments on the sensor system's frequency character and linearity have been performed. Results show that this sensor has the smallest acceleration of 1 mm s −2 .

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“…According to the working principle, fiber optic sensors to measure vibration can be based mostly on intensity or wavelength modulation schemes [9]. They can be implemented using different sensing elements such as fiber Bragg gratings (FBG) [10]- [12] or long-period gratings (LPGs) [13]- [15], mostly fabricated using conventional single mode fibers. Usually the former are interrogated in reflection and the later in transmission.…”

Section: Introductionmentioning

confidence: 99%

Vibration and Magnetic Field Sensing Using a Long-Period Grating

et al. 2017

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A long-period grating (LPG) written on a standard single mode fiber is investigated as a fiber optic sensor for vibration and magnetic field sensing. It is demonstrated the high sensitivity of the device to applied curvature and the possibility to monitor vibration in a wide range of frequencies from 30 Hz to 2000 Hz. The system was tested using intensity based interrogation scheme, providing a frequency discrimination of 913 mHz. The goal of these tests was to evaluate the sensor as a passive vibration monitor in the detection of changes in resonant vibration frequencies of support infrastructures can provide information on its degradation. Furthermore, taking advantage of the intrinsic sensitivity to micro strain, alternating magnetic fields were also measured using an intensity-based interrogation scheme by coupling a Terfenol-D magnetostrictive rod to a pre-strained LPG sensor, providing a resolution below 5.61 µT RMS /√Hz from 1.22 mT RMS up to 2.53 mT RMS .

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Interrogation a Fiber Bragg Grating vibration sensor by narrow line width light

Cited by 8 publications

References 7 publications

A comparison study of the sensing characteristics of FBG and TFBG

A comparison study of the sensing characteristics of FBG and TFBG

A micro-seismic fiber Bragg grating (FBG) sensor system based on a distributed feedback laser

Vibration and Magnetic Field Sensing Using a Long-Period Grating

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