Advances in optical fiber Bragg grating sensor technologies

Zhang, A. Ping; Gao, Shengqiang; Yan, Guofeng; Bai, Yinbing

doi:10.1007/s13320-011-0048-x

Cited by 41 publications

(22 citation statements)

References 59 publications

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“…For some physical quantities (e.g., temperature, strain, and pressure), fiber Bragg grating (FBG) sensors yield accurate and stable measurements and offer the added benefits of electrically passive operation, immunity to electromagnetic interference, and multiplexing capabilities [1]. FBG sensors therefore have been widely used in mine safety monitoring [2], industrial automation [3], structural health monitoring [4], etc.…”

Section: Introductionmentioning

confidence: 99%

A precision fiber Bragg grating interrogation system using long-wavelength vertical-cavity surface-emitting laser

Jin²,

Liu³

et al. 2016

Photonic Sens

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This paper presents the development of a cost-effective precision fiber Bragg grating (FBG) interrogation system using long-wavelength vertical-cavity surface-emitting laser (VCSEL). Tuning properties of a long-wavelength VCSEL have been studied experimentally. An approximately quadratic dependence of its wavelength on the injection current has been observed. The overall design and key operations of this system including intensity normalization, peak detection, and quadratic curve fitting are introduced in detail. The results show that the system achieves an accuracy of 1.2 pm with a tuning range of 3 nm and a tuning rate of 1 kHz. It is demonstrated that this system is practical and effective by applied in the FBG transformer temperature monitoring.

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Section: Introductionmentioning

confidence: 99%

A precision fiber Bragg grating interrogation system using long-wavelength vertical-cavity surface-emitting laser

Jin²,

Liu³

et al. 2016

Photonic Sens

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“…Long period fiber gratings (LPFG) that have attractive sensing applications [11,12] (for example in refractive index [13,14], strain, and temperature sensors [14,15]) are suitable filters because of their low insertion and return loss. These filters with different fabrication methods [16,17] and implementation capabilities on several kinds of fibers (such as photonic crystal fibers [18] and the three-layer fibers [19]) are used with various techniques for equalization.…”

Section: Introductionmentioning

confidence: 99%

Novelty design in gain flattening filter of ASE source based on fat ultra-long period fiber grating

et al. 2016

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Abstract:A new type of gain flattening filter for amplified spontaneous emission (ASE) source based on erbium doped fiber (EDF) is proposed and demonstrated by fabricating and writing two series ultra-long period fiber grating (ULPFG) on single mode fiber (SMF-28). The novelty method in this research is based on writing the two ULPFGs as fat gratings. The LPG is written by a simple and available arc-discharge method. The pump power based on single-pass backward pump configuration is around 100 mW, and the average wavelength is near to 974 nm. The gain flattening profile is obtained by 3.4 (±1.7) dB ripple in the wavelength range between 1524 nm and 1565 nm with 41-nm band width.

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“…In contrast, fiber Bragg grating (FBG)-based fiber optic sensors have significant advantages over conventional sensors such as the small size, lightweight, large dynamic range, immunity to EMI, high sensitivity and accuracy, ease to embed in civil structures, chemical inertness, and remote sensing capability. Moreover, the multiplexing property of FBG sensors makes them potential candidates for spatially distributed measurements [6][7][8][9][10][11]. However, the pressure sensitivity of a bare FBG (-0.022 pm/psi) is very low, which is to be greatly enhanced [12].…”

Section: Introductionmentioning

confidence: 99%

FBG based high sensitive pressure sensor and its low-cost interrogation system with enhanced resolution

et al. 2015

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A fiber Bragg grating (FBG) pressure sensor with high sensitivity and resolution has been designed and demonstrated. The sensor is configured by firmly fixing the FBG with a metal bellows structure. The sensor works by means of measuring the Bragg wavelength shift of the FBG with respect to pressure change. From the experimental results, the pressure sensitivity of the sensor is found to be 90.6 pm/psi, which is approximately 4000 times as that of a bare fiber Bragg grating. A very good linearity of 99.86% is observed between the Bragg wavelength of the FBG and applied pressure. The designed sensor shows good repeatability with a negligible hysteresis error of ± 0.29 psi. A low-cost interrogation system that includes a long period grating (LPG) and a photodiode (PD) accompanied with simple electronic circuitry is demonstrated for the FBG sensor, which enables the sensor to attain high resolution of up to 0.025 psi. Thermal-strain cross sensitivity of the FBG pressure sensor is compensated using a reference FBG temperature sensor. The designed sensor can be used for liquid level, specific gravity, and static/dynamic low pressure measurement applications.

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Advances in optical fiber Bragg grating sensor technologies

Cited by 41 publications

References 59 publications

A precision fiber Bragg grating interrogation system using long-wavelength vertical-cavity surface-emitting laser

A precision fiber Bragg grating interrogation system using long-wavelength vertical-cavity surface-emitting laser

Novelty design in gain flattening filter of ASE source based on fat ultra-long period fiber grating

FBG based high sensitive pressure sensor and its low-cost interrogation system with enhanced resolution

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