A linearity interrogation technique with enlarged dynamic range for fiber Bragg grating sensing

Zhan, Yufeng; Yu, Muhuo; Pei, Jincheng; Yang, Xichun; Xiang, Shiqing

doi:10.1016/j.optcom.2010.04.095

Cited by 11 publications

(5 citation statements)

References 28 publications

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“…Zhang et al, 2012). That type measuring systems is also characterized by larger linearity of technological characteristics (Zhan et al, 2010) and possibility of compensating the temperature changes influence on the measurement result (Pei et al, 2008). In the work herein, we will present the interrogation method of modes claddings, coming from the sensors, based on the tilt Bragg structures.…”

Section: Methods Of Researchmentioning

confidence: 99%

Interrogation system of signals from rotation sensors using tilted fiber Bragg gratings

et al. 2020

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The paper herein is concerned with the system of interrogating the signals, entering from rotation sensors. The systems for analyzing the sensors thereof most often require capacity's reference measurement. It allows obtaining the measurement's higher resolution comparing to single-channel systems, in which it is impossible to measure the reference power. In case of single-channel solutions, there is most frequently tracked the wavelength shift, corresponding to the extreme, according to spectral specifications.

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Section: Methods Of Researchmentioning

confidence: 99%

Interrogation system of signals from rotation sensors using tilted fiber Bragg gratings

et al. 2020

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“…Due to the sensitivity to temperature and stress, Bragg gratings are used as sensors of these physical quantities [1,16]. The most frequently used phenomenon is the shift of the Bragg resonance wavelength under the influence of temperature or stress [12,13,17].…”

Section: Introductionmentioning

confidence: 99%

Fibre Optic Bragg Structures With Monotonic Apodisation Characteristics

Klimek

2021

IAPGOS

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“…Systems with matched filter interrogation have been considered in the literature in various aspects, e.g., in terms of linearity or speed of operation [ 16 ]. When considering the shapes of sensor transfer characteristics, the most important task of an optical filter system is to achieve proper linearity or to increase the dynamic range of the system [ 18 ]. It seems that systems containing a matched filter can be adapted to applications; moreover, they allow the measurement range to be selected through their spectra width.…”

Section: Introductionmentioning

confidence: 99%

“…Widening of the FWHM parameter of a gaussian FBG is unfortunately often associated with a decrease in its reflectance. Accurate analyses and formulas for the power obtained on the detector depending on the Brag wavelength shift can be found in several publications [ 18 ]. The second type of grating proposed in the literature is the matched-filter interrogation system with a rectangular spectrum shape.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes

Skorupski

Cięszczyk

Panas

et al. 2020

Sensors

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This article presents the effect of fiber Bragg gratings side lobes on interrogation systems consisting of sensor and matched filters. The conducted research shows that high-value side lobe structures applied as sensors and/or filters are characterized by some interesting properties. The paper presents both numerical analysis and experimental verification of the fiber Bragg gratings (FBG) interrogation systems with matched filters for gratings containing high side lobes. Numerical modeling of Bragg structures was performed for two different cases: uniform and inverse apodization. Modification of apodization can change the side lobe reflectance level even above levels found in uniform structures. This is a case not described in the literature, especially in terms of possible applications. Transfer characteristics, i.e., the relationship between power intensity as a function of wavelength shift, were determined. A collection of gratings with spectra corresponding to those analyzed in numerical experiments were fabricated. Next, the transfer characteristics of the interrogation systems containing real FBG were determined. The properties of the proposed systems are described. It has been shown that a significant level of sidebands, which is often the subject of many drawbacks in filtering or telecommunications systems, can be an advantage. It has been demonstrated that a high level of side lobes can be used to increase the measurement range of the FBG sensor interrogation systems. It has been determined numerically and confirmed experimentally that from the point of view of the design of sensor interrogation systems, it is beneficial to combine specific pairs of gratings: one with a spectrum characterized by a low side lobe level and a second one in which the spectrum has very high side lobes.

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A linearity interrogation technique with enlarged dynamic range for fiber Bragg grating sensing

Cited by 11 publications

References 28 publications

Interrogation system of signals from rotation sensors using tilted fiber Bragg gratings

Interrogation system of signals from rotation sensors using tilted fiber Bragg gratings

Fibre Optic Bragg Structures With Monotonic Apodisation Characteristics

Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes

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