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Journal articles on the topic 'Grating sensor'

Author: Grafiati

Published: 6 September 2023

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1

Bartelt, Hartmut. "Fiber Bragg Grating Sensors and Sensor Arrays." Advances in Science and Technology 55 (September 2008): 138–44. http://dx.doi.org/10.4028/www.scientific.net/ast.55.138.

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Fiber Bragg gratings have found widespread application in sensor systems, e. g. for temperature, strain or refractive index measurements. The concept of fiber Bragg gratings allows also in a simple way the realisation of arrays of such sensors. The development of such optical fiber sensor systems often requires special fibers and grating structures which may go beyond more conventional Bragg grating structures in typical communication fibers. Concerning fibers there is, for example., a need of achieving fiber gratings in small diameter fibers and fiber tapers as well as in microstructured fibe

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2

Tian, Zhenhua, Lingyu Yu, Xiaoyi Sun, and Bin Lin. "Damage localization with fiber Bragg grating Lamb wave sensing through adaptive phased array imaging." Structural Health Monitoring 18, no. 1 (2018): 334–44. http://dx.doi.org/10.1177/1475921718755572.

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Fiber Bragg gratings are known being immune to electromagnetic interference and emerging as Lamb wave sensors for structural health monitoring of plate-like structures. However, their application for damage localization in large areas has been limited by their direction-dependent sensor factor. This article addresses such a challenge and presents a robust damage localization method for fiber Bragg grating Lamb wave sensing through the implementation of adaptive phased array algorithms. A compact linear fiber Bragg grating phased array is configured by uniformly distributing the fiber Bragg gra

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Cao, Jianjun, Yuan Sun, Yan Kong, and Weiying Qian. "The Sensitivity of Grating-Based SPR Sensors with Wavelength Interrogation." Sensors 19, no. 2 (2019): 405. http://dx.doi.org/10.3390/s19020405.

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In this paper, we derive the analytical expression for the sensitivity of grating-based surface plasmon resonance (SPR) sensors working in wavelength interrogation. The theoretical analysis shows that the sensitivity increases with increasing wavelength and is saturated beyond a certain wavelength for Au and Ag gratings, while it is almost constant for Al gratings in the wavelength range of 500 to 1000 nm. More importantly, the grating period (P) and the diffraction order (m) dominate the value of sensitivity. Higher sensitivity is possible for SPR sensors with a larger grating period and lowe

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Jiao, Fei, Yuqing Lei, Guozheng Peng, Funing Dong, Qing Yang, and Wei Liao. "Grating Spectrum Design and Optimization of GMM-FBG Current Sensor." Energies 16, no. 2 (2023): 997. http://dx.doi.org/10.3390/en16020997.

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In this study, the performance of a current sensor based on giant magnetostrictive materials (GMM) and fiber Bragg grating (FBG) has been improved by optimizing the spectral characteristics of gratings. By analyzing the influence of FBG on the current sensor characteristics, three key parameters (gate region length, refractive index modulation depth, and toe cutting system) are selected for optimization. The optimal grating parameters are determined to improve the linearity and sensitivity of sensor output. Experimental tests reveal that after grating optimization, the current sensor shows exc

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Gao, Xiaoyu, Shengjie Cao, Yongqiu Zheng, and Jiandong Bai. "A Compact Fabry–Pérot Acoustic Sensor Based on Silicon Optical Waveguide Bragg Gratings." Photonics 10, no. 8 (2023): 861. http://dx.doi.org/10.3390/photonics10080861.

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No membranous optical sensors have excellent development prospects in aerospace and other industrial fields due to their small size and anti-electromagnetic interference. Here, we proposed a novel Fabry–Pérot (FP) cavity acoustic sensor based on silicon optical waveguide Bragg gratings. The FP cavity consists of two Bragg gratings written on the silicon-based optical waveguide and a miniature air groove. When the sound signal acts on the miniature air groove, the sound pressure changes the density of air molecules near the waveguide grating’s evanescent field, causing variation in the air’s re

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Babu, Sachin, and Jeong-Bong Lee. "Axially-Anisotropic Hierarchical Grating 2D Guided-Mode Resonance Strain-Sensor." Sensors 19, no. 23 (2019): 5223. http://dx.doi.org/10.3390/s19235223.

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Guided-mode resonance strain sensors are planar binary gratings that have fixed resonance positions and quality factors decided by material properties and grating parameters. If one is restricted by material choices, the quality factor can only be improved by adjusting the grating parameters. We report a new method to improve quality factor by applying a slotting design rule to a grating design. We investigate this design rule by first providing a theoretical analysis on how it works and then applying it to a previously studied 2D solid-disc guided-mode resonance grating strain sensor design t

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Bartelt, Hartmut. "Trends in Bragg Grating Technology for Optical Fiber Sensor Applications." Key Engineering Materials 437 (May 2010): 304–8. http://dx.doi.org/10.4028/www.scientific.net/kem.437.304.

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Fiber Bragg gratings have found widespread and successful applications in optical sensor systems, e. g. for temperature, strain or refractive index measurements. Such sensor elements are fiber integrated, are applicable under harsh environmental conditions, and can be easily multiplexed. In order to further extend the field of applications, there is a great interest in specifically adapted Bragg gratings, in Bragg grating structures with increased stability, or in the use of special fiber types for grating inscription. The paper discusses such specific concepts for grating inscription, covers

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Thursby, G., B. Sorazu, D. Betz, M. Staszewski, and B. Culshaw. "The Use of Fibre Optic Sensors for Damage Detection and Location in Structural Materials." Applied Mechanics and Materials 1-2 (September 2004): 191–96. http://dx.doi.org/10.4028/www.scientific.net/amm.1-2.191.

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The measurement of changes in the properties of ultrasonic Lamb waves propagating through structural material has frequently been proposed as a method for the detection of damage. In this paper we describe work that uses optical fibre sensors to detect the Lamb waves and show that the directional properties of these sensors allow us to not only detect damage, but also to locate it. We look at two types of optical fibre sensor, a polarimetric sensor and the fibre Bragg grating. The polarimetric sensor measures the change in birefringence of a fibre caused by the pressure wave of the ultrasound

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9

Yang, Zhiyong, Xiaochen Ma, Daguo Yu, et al. "An Ultracompact Angular Displacement Sensor Based on the Talbot Effect of Optical Microgratings." Sensors 23, no. 3 (2023): 1091. http://dx.doi.org/10.3390/s23031091.

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Here, we report an ultracompact angular displacement sensor based on the Talbot effect of optical microgratings. Periodic Talbot interference patterns were obtained behind an upper optical grating. By putting another grating within the Talbot region, the total transmission of the two-grating structure was found to be approximatively in a linear relationship with the relative pitch angle between the two gratings, which was explained by a transversal shift of the Talbot interference patterns. The influence of the grating parameters (e.g., the grating period, the number of grating lines and the g

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Missinne, Jeroen, Nuria Teigell Benéitez, Marie-Aline Mattelin, et al. "Bragg-Grating-Based Photonic Strain and Temperature Sensor Foils Realized Using Imprinting and Operating at Very Near Infrared Wavelengths." Sensors 18, no. 8 (2018): 2717. http://dx.doi.org/10.3390/s18082717.

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Thin and flexible sensor foils are very suitable for unobtrusive integration with mechanical structures and allow monitoring for example strain and temperature while minimally interfering with the operation of those structures. Electrical strain gages have long been used for this purpose, but optical strain sensors based on Bragg gratings are gaining importance because of their improved accuracy, insusceptibility to electromagnetic interference, and multiplexing capability, thereby drastically reducing the amount of interconnection cables required. This paper reports on thin polymer sensor foi

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11

Hsieh, Hung-Chih, Yi-Ming Lu, and Ke-Cheng Huang. "Glucose Concentration Measurement by All-Grating-Based System." Sensors 23, no. 9 (2023): 4216. http://dx.doi.org/10.3390/s23094216.

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An accurate, easy setup, low-cost, and time-saving method for measuring glucose concentration was proposed. An all-grating-based glucose concentration measurement system contained moving-grating-based heterodyne interferometry and a grating-based self-align sensor. By combining the first-order diffraction lights from two separated moving gratings by a polarization beam splitter and creating S- and P-polarized light interference by an analyzer, the interference signal could be a heterodyne light source with a heterodyne frequency depending on the relative velocities of the two moving gratings.

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Meyer, Jan, Antonio Nedjalkov, Christian Kelb, Gion Joel Strobel, Leonhard Ganzer, and Wolfgang Schade. "Manufacturing and Characterization of Femtosecond Laser-Inscribed Bragg Grating in Polymer Waveguide Operation in an IR-A Wavelength Range." Sensors 20, no. 1 (2020): 249. http://dx.doi.org/10.3390/s20010249.

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Optical sensors, such as fiber Bragg gratings, offer advantages compared to other sensors in many technological fields due to their outstanding characteristics. This sensor technology is currently transferred to polymer waveguides that provide the potential for cost-effective, easy, and flexible manufacturing of planar structures. While sensor production itself, in the majority of cases, is performed by means of phase mask technique, which is limited in terms of its degrees of freedom, other inscription techniques enable the manufacture of more adaptable sensor elements for a wider range of ap

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Volkova L. V., Kazantsev S. Y., Muzychka A. Yu., and Skobeleva V. S. "Wavefront sensor for wide-aperture laser beams and its applications." Technical Physics 92, no. 9 (2022): 1217. http://dx.doi.org/10.21883/tp.2022.09.54686.49-22.

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The results of studies of a wavefront sensor based on the Talbot effect, in which a periodic grating made by laser printing is used, are presented. The optical characteristics of periodic gratings printed on polymer films exposed to a continuous radiation density of up to 0.9 W/cm2 have been studied. The possibility of creating efficient configurable wavefront sensors for lasers in the visible and mid-IR spectral ranges is demonstrated. Keywords: wavefront sensor, Talbot effect, wide-aperture laser beams, polymer films, periodic gratings.

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14

Wang, Bowen, Yi Zhou, Zhihe Guo, and Xiang Wu. "Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model." Sensors 19, no. 11 (2019): 2569. http://dx.doi.org/10.3390/s19112569.

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The distributed feedback (DFB) laser is widely used in sensing because of its portable size, simple fabrication and high sensitivity. Most theoretical design models are based on passive Bragg gratings. However, passive grating models cannot be used to predict sensor performance using the important indicator of figure of merit (FOM) through theoretical calculations. To solve this problem, we replaced the passive grating with an active grating by using the imaginary part of the coupling constant that represents the value of the gain. As a comparison, the influence of the full width at half maxim

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15

Dhavamani, Vigneshwar, Srijani Chakraborty, S. Ramya, and Somesh Nandi. "Design and Simulation of Waveguide Bragg Grating based Temperature Sensor in COMSOL." Journal of Physics: Conference Series 2161, no. 1 (2022): 012047. http://dx.doi.org/10.1088/1742-6596/2161/1/012047.

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Abstract With the advancements in the domain of photonics and optical sensors, Fibre Bragg Grating (FBG) sensors, owing to their increased advantages, have been researched widely and have proved to be useful in sensing applications. Moreover, the advent of Photonic Integrated Circuits (PICs) demands the incorporation of optical sensing in waveguides, which can be integrated on silicon photonic chips. In this paper, the design of a sub-micron range Waveguide Bragg Grating (WBG) based temperature sensor with high peak reflectivity and thermal sensitivity is proposed. The flexibility of COMSOL Mu

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16

Jalil, Muhammad Arif Bin. "Simulation of Fiber Bragg Grating Characteristics and Behaviors as Strain and Temperature Sensor." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (2021): 1154–61. http://dx.doi.org/10.22214/ijraset.2021.38883.

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Abstract: Optical Fiber Sensor (OFS) has come quite considerable and famous in world of sensor technology where it has been used widely to detect for a changeable environment and responds to some output on other system such as in industrial, chemical analysis and monitoring. A Fiber Bragg Grating (Fiber Bragg Grating) is a kind of appropriated where the short fragment of optical fiber which certain and specific wavelength is reflected with light and the Bragg reflector started developed and transmits all others. The current project is concerned with the development characteristics and behavior

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17

Wang, Xian Quan, Hong Guang Zhang, Yi Tan Lei, Gui Lin Zhu, and Yao Yu. "Design and Simulation Analysis of Two-Phase Grating-Type Displacement Sensors with Unequal-Pitch." Applied Mechanics and Materials 631-632 (September 2014): 548–52. http://dx.doi.org/10.4028/www.scientific.net/amm.631-632.548.

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With the development of grating displacement sensors towards higher precision and higher speed of dynamic responses, the traditional design structure is hard to solve the processing difficulty of the increasing number of poles for time grating sensors. In order to realize the analysis on the internal magnetic field distribution of high precision displacement sensor, the unequal pitch grating displacement sensor with two phase model is established using Ansoft Maxwell simulation environment. The feasibility of the two unequal pitch grating displacement sensor and magnetic field simulation are p

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18

Yu, Hai Ying, Xiao Liu, Tong Yu Liu, Lin Suo, and Ling Song Yu. "A Novel Chirped Fiber Grating Sensor for Strain Detection." Applied Mechanics and Materials 94-96 (September 2011): 1222–26. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.1222.

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In this paper, a novel strain sensor based on chirped fiber grating with temperature compensation is presented. The proposed strain sensor uses double chirped fiber gratings. The temperature compensation exploit the principle that the wavelength shifts of these two chirped fiber gratings induced by temperature is consistent. This strain sensor is demodulated by the light intensity detection with low cost. Furthermore, the strain sensor is simulated in the end of this paper.

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19

Odinokov, Sergey, Maria Shishova, Michael Kovalev, Alexander Zherdev, and Dmitrii Lushnikov. "Phase Imbalance Optimization in Interference Linear Displacement Sensor with Surface Gratings." Sensors 20, no. 5 (2020): 1453. http://dx.doi.org/10.3390/s20051453.

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In interferential linear displacement sensors, accurate information about the position of the reading head is calculated out of a pair of quadrature (sine and cosine) signals. In double grating interference schemes, diffraction gratings combine the function of beam splitters and phase retardation devices. Specifically, the reference diffraction grating is located in the reading head and regulates the phase shifts in diffraction orders. Measurement diffraction grating moves along with the object and provides correspondence to the displacement coordinate. To stabilize the phase imbalance in the

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20

Kiesewetter, Dmitry, Sergey Krivosheev, Sergey Magazinov, et al. "Application of Fiber Bragg Gratings as a Sensor of Pulsed Mechanical Action." Sensors 22, no. 19 (2022): 7289. http://dx.doi.org/10.3390/s22197289.

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The pulsed elongation of fiber Bragg gratings is considered in order to be used to measure the displacement or deformation rate of objects. Optimal measurement modes were determined, numerical simulation of the output signal was performed during pulsed elongation or compression of the fiber grating, and the main patterns were analyzed. The results of the application of the Bragg gratings for the experimental determination of the deformation rate of materials under pulsed magnetic action are presented. Experimentally obtained and theoretical dependencies are compared. The dependencies of the ch

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21

Mattelin, Marie-Aline, Jeroen Missinne, Bert De Coensel, and Geert Van Steenberge. "Imprinted Polymer-Based Guided Mode Resonance Grating Strain Sensors." Sensors 20, no. 11 (2020): 3221. http://dx.doi.org/10.3390/s20113221.

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Optical sensors based on guided mode resonance (GMR) realized in polymers are promising candidates for sensitive and cost effective strain sensors. The benefit of GMR grating sensors is the non-contact, easy optical read-out with large working distance, avoiding costly alignment and packaging procedures. The GMR gratings with resonance around 850–900 nm are fabricated using electron beam lithography and replicated using a soft stamp based imprinting technique on 175 μ m-thick foils to make them suitable for optical strain sensing. For the strain measurements, foils are realized with both GMR g

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A. Tolegenova, M. Yerishova, A. Zhetpisbayeva, K. Zhetpisbayev, and A. S. Tolegenova. "INVESTIGATION OF THE TEMPERATURE DEPENDENCE OF TFBG WITH TILT ANGLES OF 20 AND 40." Bulletin of Toraighyrov University. Energetics series, no. 2.2022 (June 30, 2022): 322–33. http://dx.doi.org/10.48081/bxag3995.

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Due to advantages such as electromagnetic stability, durability, and high sensitivity, fiber Bragg gratings have found application as sensors of physical quantities. A special place in the line of such devices is occupied by Bragg gratings with tilted strokes (Tilted fiber Bragg grating- TFBG). At the moment, TFBGs are used to estimate the velocity of two-phase flows, to create a torsion sensor, as temperature and deformation sensors, etc. This article examines the possibility of implementing a temperature sensor based on TFBG with an angle of inclination of 2° and 4° inscribed in a single-mod

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Xing, S. Y., Q. Wang, and A. X. Liu. "Research on basic principle and calibration experiment of fiber bragg grating sensor." IOP Conference Series: Materials Science and Engineering 1242, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1757-899x/1242/1/012040.

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Abstract Fiber bragg grating has the advantages of simple structure, light weight, small volume, low energy consumption, high sensitivity and measurement accuracy, and is widely used in the field of structural health monitoring. the structure and basic principle of fiber bragg grating sensor are introduced. the change of temperature, stress and other parameters will lead to the change of reflection center wavelength. The strain and temperature sensitivity coefficients of Fiber Bragg Grating sensors with different wavelengths are obtained. The fiber Bragg grating strain sensor is developed, and

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Lee, Songbi, and Joohyeon Lee. "Braided Fabrication of a Fiber Bragg Grating Sensor." Sensors 20, no. 18 (2020): 5246. http://dx.doi.org/10.3390/s20185246.

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Our objective was to construct textile braiding manufacturing methods to facilitate high precision and accurate measurements using optical fiber Bragg grating sensors for various structures. We aimed to combine three-dimensional (3D) braiding processing with the optical Bragg grating sensor’s accurate metrology. Outside the limits of the sensor’s epoxy attachment methods, the textile braiding method can diversify the scope of application. The braiding process can be used to design a 3D fabric module process for multiple objective mechanical fiber arrangements and material characteristics. Opti

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Malayappan, Balasubramanian, Narayan Krishnaswamy, and Prasant Kumar Pattnaik. "Novel High-Resolution Lateral Dual-Axis Quad-Beam Optical MEMS Accelerometer Using Waveguide Bragg Gratings." Photonics 7, no. 3 (2020): 49. http://dx.doi.org/10.3390/photonics7030049.

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A novel lateral dual-axis a-Si/SiO2 waveguide Bragg grating based quad-beam accelerometer with high-resolution and large linear range has been presented in this paper. The sensor consists of silicon bulk micromachined proof mass suspended by silica beams. Three ridge gratings are positioned on the suspending beam and proof mass to maximize sensitivity and reduce noise. Impact of external acceleration in the sensing direction on the Bragg wavelength of gratings and MEMS structure has been modelled including the effects of strain, stress and temperature variation. Acceleration induces stress in

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Kameshkov, Oleg, Vasily Gerasimov, and Boris Knyazev. "Numerical Optimization of Refractive Index Sensors Based on Diffraction Gratings with High Aspect Ratio in Terahertz Range." Sensors 22, no. 1 (2021): 172. http://dx.doi.org/10.3390/s22010172.

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Terahertz surface plasmon resonance (SPR) sensors have been regarded as a promising technology in biomedicine due to their real-time, label-free, and ultrasensitive monitoring features. Different authors have suggested a lot of SPR sensors, including those based on 2D and 3D metamaterials, subwavelength gratings, graphene, and graphene nanotube, as well as others. However, one of the traditional approaches to realize high sensitivity SPR sensors based on metal diffraction gratings has been studied poorly in the terahertz frequency range. In this article, a linear metal rectangular diffraction

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Hessler, Steffen, Marieke Rüth, Horst-Dieter Lemke, Bernhard Schmauss, and Ralf Hellmann. "Deep UV Formation of Long-Term Stable Optical Bragg Gratings in Epoxy Waveguides and Their Biomedical Sensing Potentials." Sensors 21, no. 11 (2021): 3868. http://dx.doi.org/10.3390/s21113868.

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In this article, we summarize our investigations on optimized 248 nm deep ultraviolet (UV) fabrication of highly stable epoxy polymer Bragg grating sensors and their application for biomedical purposes. Employing m-line spectroscopy, deep UV photosensitivity of cross-linked EpoCore thin films in terms of responding refractive index change is determined to a maximum of Δn = + (1.8 ± 0.2) × 10−3. All-polymer waveguide Bragg gratings are fabricated by direct laser irradiation of lithographic EpoCore strip waveguides on compatible Topas 6017 substrates through standard +1/-1-order phase masks. Acc

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Liu, Jun Sheng, and Ming Liang Liu. "Application Research of Fiber Grating Sensor in Structural Health Monitoring." Advanced Materials Research 243-249 (May 2011): 5365–68. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5365.

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The fiber grating sensor with its unique advantages in the structural health monitoring used and more extensive. Based on Fiber Bragg Grating as an example, this paper expounds the FBG sensor system integration method, the principle of fiber grating sensors, aiming at temperature drift characteristics of FBG, proposes a new method of temperature drift compensation by using metal platinum resistance. On the other hand, the existing fiber grating monitoring system is used mostly in the series of topological way, which impacts of the sensor's survival rate, this paper proposes a new method of com

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Tomyshev, K. A., E. I. Dolzhenko, and O. V. Butov. "Correlation between optical fibre diameter and characteristics of tilted fibre Bragg grating-assisted sensors." Quantum Electronics 51, no. 12 (2021): 1113–17. http://dx.doi.org/10.1070/qel17663.

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Abstract We report the results of a study on the influence of the fibre cladding diameter on the accuracy and resolution of tilted fibre Bragg grating-assisted refractometers. Tilted fibre Bragg gratings are an essential element used to develop high-precision fibre sensors for environmental monitoring. Comparative research was performed using one of comprehensive processing algorithms employing spectral envelope analysis. It was shown that the sensor accuracy decreases with decreasign fibre cladding diameter. At the same time, an increase in the diameter deteriorates the spectral pattern contr

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Lee, Yeon-Gwan, and Chun-Gon Kim. "Impact source identification for pipe structure based on a one-dimensional fiber Bragg grating sensor array." Journal of Intelligent Material Systems and Structures 28, no. 12 (2017): 1662–69. http://dx.doi.org/10.1177/1045389x16679292.

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This article presents a spatial impact source identification based on a one-dimensional fiber Bragg grating sensor array for application in tubular structures. The effective number of sensors and the sensor arrangement method were investigated for the plumbing pipe structure as the application subject. The fiber Bragg grating sensors were used to determine the impact location via the signal processing of the measured acoustic emission signals with a sampling frequency of 100 kHz. The root mean squared value–based algorithm, which was newly verified for a stiffened composite structure, was empl

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Hosono, Koji, WooJae Kim, Akihide Kimura, Yuki Shimizu, and Wei Gao. "Surface Encoders for a Mosaic Scale Grating." International Journal of Automation Technology 5, no. 2 (2011): 91–96. http://dx.doi.org/10.20965/ijat.2011.p0091.

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The surface encoder we propose for simultaneously measuring XYZ-directional displacements consists of a XY-axis with a scale grating and an optical sensor head. The XY-axis scale grating size determines the surface encoder’s measurement range in plane - in the X and Y directions. The mosaic XY-axis scale grating we use to expand the measurement range in plane consists of multiple XY-axis scale gratings arranged in plane. We present two optical configurations for the mosaic XY-axis scale grating. To confirm our configurations’ effectiveness, we fabricated two prototypes that we tested in basic

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Wang, Shuchao, Fu Wan, Hong Zhao, Weigen Chen, Weichao Zhang, and Quan Zhou. "A Sensitivity-enhanced Fiber Grating Current Sensor Based on Giant Magnetostrictive Material for Large-Current Measurement." Sensors 19, no. 8 (2019): 1755. http://dx.doi.org/10.3390/s19081755.

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Currently, in the modern power industry, it is still a great challenge to achieve high sensitivity and uninterrupted-online measurement of large current on the high voltage gridlines. At present, the fiber grating current sensors based on giant magnetostrictive material used in the modern power industry to achieve uninterrupted-online measurement of large currents on high voltage grid lines is a better method, but the sensitivity of this current sensor is relatively low, therefore, it is key to improve the sensitivity of this current sensor. Here we show a sensitivity-enhanced fiber grating cu

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Aristilde, Stenio, Cristiano M. B. Cordeiro, and Jonas H. Osório. "Gasoline Quality Sensor Based on Tilted Fiber Bragg Gratings." Photonics 6, no. 2 (2019): 51. http://dx.doi.org/10.3390/photonics6020051.

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We report on the study of an intensity-based optical fiber sensor for gasoline quality monitoring. The sensor setup employs two Bragg gratings with different spectral responses to interrogate the optical response of a tilted Bragg grating. The sensor operation is based on the tilted Bragg grating sensitivity to external refractive index changes, which are translated as power variations by the interrogation scheme. Gasoline–ethanol solutions with concentrations ranging from 0% to 60% ethanol were used to demonstrate the sensor performance. The results allowed to estimate that the sensor is able

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Braunfelds, Janis, Elvis Haritonovs, Ugis Senkans, et al. "Designing of Fiber Bragg Gratings for Long-Distance Optical Fiber Sensing Networks." Modelling and Simulation in Engineering 2022 (October 5, 2022): 1–14. http://dx.doi.org/10.1155/2022/8331485.

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Most optical sensors on the market are optical fiber Bragg grating (FBG) sensors with low reflectivity (typically 7-40%) and low side-lobe suppression (SLS) ratio (typically SLS <15 dB), which prevents these sensors from being effectively used for long-distance remote monitoring and sensor network solutions. This research is based on designing the optimal grating structure of FBG sensors and estimating their optimal apodization parameters necessary for sensor networks and long-distance monitoring solutions. Gaussian, sine, and raised sine apodizations are studied to achieve the main require

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Gao, Zhong Hua. "Error Calibration System for Time Grating Angular Displacement Sensor." Advanced Materials Research 662 (February 2013): 705–8. http://dx.doi.org/10.4028/www.scientific.net/amr.662.705.

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A calibration system was developed for time grating angular displacement sensors to calibrate errors of this type of sensor. In the system, the motor was controlled by ARM processor according to the setting value coming from the USB port of the computer, and therefore the motor outputted angular displacement values. Meanwhile, with the motor turning, the optical grating, which was used as the criterion instrument, and time grating turned together corresponding angular displacements. Several displacement values from a circle of sensors of time grating and optical grating were sent to computer b

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Kim, Sang-Woo. "Signal characteristics of surface-bonded fiber Bragg grating sensor with elastoplastic metallic coating subjected to residual strain." Journal of Intelligent Material Systems and Structures 29, no. 17 (2017): 3374–85. http://dx.doi.org/10.1177/1045389x17708044.

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This study involved predicting the reflected spectrum of a surface-bonded fiber Bragg grating sensor with an elastoplastic metallic coating wherein residual strains are non-uniformly distributed on the sensor. A profile of residual strains was numerically calculated based on the stepwise numerical technique by adopting strain transfer analysis and was validated by finite element analysis. The reflected spectrum of a metal-coated fiber Bragg grating sensor was consequently simulated to obtain the calculated profile of residual strains through the Transfer-matrix (T-matrix) method and coupled mo

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Pedroso, Marcelo A., Lucas H. Negri, Marcos A. Kamizi, José L. Fabris, and Marcia Muller. "Tactile Sensor Array with Fiber Bragg Gratings in Quasi-Distributed Sensing." Journal of Sensors 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/6506239.

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This work describes the development of a quasi-distributed real-time tactile sensing system with a reduced number of fiber Bragg grating-based sensors and reports its use with a reconstruction method based on differential evolution. The sensing system is comprised of six fiber Bragg gratings encapsulated in silicone elastomer to form a tactile sensor array with total dimensions of 60 × 80 mm, divided into eight sensing cells with dimensions of 20 × 30 mm. Forces applied at the central position of the sensor array resulted in linear response curves for the gratings, highlighting their coupled r

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Hudson, Tyler B., Nicolas Auwaijan, and Fuh-Gwo Yuan. "Guided wave-based system for real-time cure monitoring of composites using piezoelectric discs and phase-shifted fiber Bragg gratings." Journal of Composite Materials 53, no. 7 (2018): 969–79. http://dx.doi.org/10.1177/0021998318793512.

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A real-time, in-process cure monitoring system employing a guided wave-based concept for carbon fiber reinforced polymer composites was developed. The system included a single piezoelectric disc that was bonded to the surface of the composite for excitation, and an embedded phase-shifted fiber Bragg grating for sensing. The phase-shifted fiber Bragg grating almost simultaneously measured both quasi-static strain and the ultrasonic guided wave-based signals throughout the cure cycle. A traditional FBG was also used as a base for evaluating the high sensitivity of the phase-shifted fiber Bragg g

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Mihailov, Stephen J., Cyril Hnatovsky, Nurmemet Abdukerim, et al. "Ultrafast Laser Processing of Optical Fibers for Sensing Applications." Sensors 21, no. 4 (2021): 1447. http://dx.doi.org/10.3390/s21041447.

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A review of recent progress in the use of infrared femtosecond lasers to fabricate optical fiber sensors that incorporate fiber Bragg gratings (FBG) and random fiber gratings (RFG) is presented. The important advancements in femtosecond laser writing based on the phase mask technique now allow through-the-coating (TTC) fabrication of Bragg gratings in ultra-thin fiber filaments, tilted fiber Bragg gratings, and 1000 °C-resistant fiber Bragg gratings with very strong cladding modes. As an example, through-the-coating femtosecond laser writing is used to manufacture distributed fiber Bragg grati

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Li, Ying Na, Xiao Yong Cao, Tao Xie, et al. "Monitoring of Tunnel Second Lining and Steel Lining by Using Fiber Bragg Grating Strain Sensor." Applied Mechanics and Materials 330 (June 2013): 479–84. http://dx.doi.org/10.4028/www.scientific.net/amm.330.479.

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Dong Yang Tunnel is located in the low mountains and hilly areas with tectonic denudation, where the tunnel of K147+535~K147+575 passes mainly through the maroon and purple red completely weathered mudstone. A differential fiber Bragg grating strain sensor is developed for monitoring the surface strain of tunnel lining. By converting the strain of gauge rod into the strain of beam, two fiber Bragg gratings are separately mounted on the top and bottom surfaces of beam, and as a result shifts its Bragg wavelength. The difference of relative Bragg wavelength shifts of the sensing gratings is 1.05

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Ran, Zengling, Xiu He, Yunjiang Rao, et al. "Fiber-Optic Microstructure Sensors: A Review." Photonic Sensors 11, no. 2 (2021): 227–61. http://dx.doi.org/10.1007/s13320-021-0632-7.

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AbstractThis paper reviews a wide variety of fiber-optic microstructure (FOM) sensors, such as fiber Bragg grating (FBG) sensors, long-period fiber grating (LPFG) sensors, Fabry-Perot interferometer (FPI) sensors, Mach-Zehnder interferometer (MZI) sensors, Michelson interferometer (MI) sensors, and Sagnac interferometer (SI) sensors. Each FOM sensor has been introduced in the terms of structure types, fabrication methods, and their sensing applications. In addition, the sensing characteristics of different structures under the same type of FOM sensor are compared, and the sensing characteristi

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Zhang, Heng, Jun Yao, Feng Gang Tao, and Xu Ye Zhuang. "MEMS Grating with Interdigitated-Comb Structure." Key Engineering Materials 503 (February 2012): 49–54. http://dx.doi.org/10.4028/www.scientific.net/kem.503.49.

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Grating as an important spectral component can be applied to spectral analysis, filtering, dispersion compensation, sensing and so on. Their advantages are compactness, potentially high actuation speed and the ability to deflect light at large angles. In this paper, a MEMS interdigitated-comb grating actuated by a comb-drive actuator is presented. An experiment is performed to demonstrate how the proposed grating works with an applied voltage. At 85V, the displacement of comb-drive actuator can achieve 2.1μm; accordingly the gap between the interdigitated-comb gratings varies by 2.1μm. The mec

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Voet, Eli, Geert Luyckx, Ives De Baere, et al. "High Strain Monitoring during Fatigue Loading of Thermoplastic Composites Using Imbedded Draw Tower Fibre Bragg Grating Sensors." Advances in Science and Technology 56 (September 2008): 441–46. http://dx.doi.org/10.4028/www.scientific.net/ast.56.441.

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This paper presents the experimental study of fibre Bragg grating sensors for measuring strain inside composite laminates during fatigue loading. The optical fibres are imbedded inside thermoplastic CFRP test-coupons which have an ultimate strain of about 1.1%. Tension – tension fatigue cycling at a rate of 5Hz is been carried out at 314MPa with a maximum strain of 0.51%. At such extreme strain levels the use of high strength sensors becomes inevitable. Neither the sensor nor the composite test-coupons showed any significant degradation even after more than 500000 cycles. Fibre optic Bragg gra

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Liu, Hanjie, Ciming Zhou, Yandong Pang, Xi Chen, Ye Xu, and Dian Fan. "High-Resolution Optical Fiber Temperature Sensor Based on Draw Tower Grating Array." Sensors 22, no. 8 (2022): 2846. http://dx.doi.org/10.3390/s22082846.

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Ocean temperature monitoring is of great significance to marine fishing, aquaculture, and marine operations. Traditional electric sensors lack the potential to multiplex several sensors, and may suffer from electromagnetic interference. Meanwhile, fiber Bragg grating-based sensors have the advantages of high sensitivity, possibility for large-scale multiplexing, and immunity to electromagnetic interference. In this paper, we propose a Fabry–Pérot (FP) interferometer based on the draw tower grating array and combine it with the phase measurement method for demonstration and testing. In the sens

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Kocaman, ES, C. Yilmaz, A. Deniz, and M. Yildiz. "The performance of embedded fiber Bragg grating sensors for monitoring failure modes of foam cored sandwich structures under flexural loads." Journal of Sandwich Structures & Materials 20, no. 5 (2016): 553–77. http://dx.doi.org/10.1177/1099636216664777.

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In this study, failure modes of foam core sandwich composites are investigated by using embedded Fiber Bragg Grating sensors. Sandwich specimens with Fiber Bragg Grating sensors, embedded inside the face sheet, are manufactured using vacuum infusion process and then subjected to a static and a cyclic loading under the three-point bending mode. Different failure modes are monitored utilizing the wavelength shift and the spectrum of Fiber Bragg Grating sensors. It is shown that the responses of the Fiber Bragg Grating sensor differ depending on damage modes thereby making structural health monit

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Zhang, Han, and Lijun Meng. "Research status of sensor demodulation technology of fiber grating ultrasonic signal." Journal of Physics: Conference Series 2302, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1742-6596/2302/1/012001.

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Abstract Compared with ordinary gratings, phase-shifted fiber gratings have better ultrasonic response sensitivity and higher upper response frequency. The application of phase-shifted fiber gratings in ultrasonic signal detection has gradually become a research hotspot. This paper mainly introduces the demodulation principle of tunable laser power scanning and wavelength feedback control techniques such as wavelength stabilization, frequency stabilization and laser tracking. Most of the existing demodulation techniques are only suitable for single optical channel, and the demodulation frequen

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Butt, Muhammad Ali. "Numerical investigation of a small footprint plasmonic Bragg grating structure with a high extinction ratio." Photonics Letters of Poland 12, no. 3 (2020): 82. http://dx.doi.org/10.4302/plp.v12i3.1042.

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In this paper, miniaturized design of a plasmonic Bragg grating filter is investigated via the finite element method (FEM). The filter is based on a plasmonic metal-insulator-metal waveguide deposited on a quartz substrate. The corrugated Bragg grating designed for near-infrared wavelength range is structured on both sides of the waveguide. The spectral characteristics of the filter are studied by varying the geometric parameters of the filter design. As a result, the maximum ER and bandwidth of 36.2 dB and 173 nm is obtained at λBragg=976 nm with a filter footprint of as small as 1.0 x 8.75 µ

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Geng, Jin Feng, Dong Fang Ma, Hong Sheng Cai, Wen Tao Wu, Jun Wei Dong, and Xiao Huan Shen. "The Comparison and Analysis of Fiber Grating Strain Sensor and Resistance Strain Slice for Transmission Tower Vibration Monitoring." Applied Mechanics and Materials 533 (February 2014): 211–13. http://dx.doi.org/10.4028/www.scientific.net/amm.533.211.

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Contrast advantages and existing problems of resistance strain slice and fiber grating strain sensor for tower vibration strain monitoring, compare the structure of the two, and do the on-site installation and experiments, analyze the monitoring data. It can make a conclusion that the properties of fiber bragg grating strain sensors are basic consistent with resistance strain slice. And fiber bragg grating strain sensors can be used for transmission tower vibration monitoring .

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Eid, Mahmoud M. A., and Ahmed Nabih Zaki Rashed. "Numerical simulation of long-period grating sensors (LPGS) transmission spectrum behavior under strain and temperature effects." Sensor Review 41, no. 2 (2021): 192–99. http://dx.doi.org/10.1108/sr-10-2020-0248.

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Purpose The purpose of this study aims to simulate the long-period fiber grating sensor pulse peak position against the transmission range. The long-period fiber grating sensor pulse peak position against the transmission range is simulated clearly where the pulse peak value at zero position is 0.972655 with the ripple factor of unity. It is demonstrated that the long-period fiber grating sensor bandwidth can be estimated to be 50 µm. Wavelength shift of the long-period grating sensor (LPGS) is reported against grating wavelength, applied temperatures and applied micro strain. Design/methodolo

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Silva, A. F., F. Gonçalves, L. A. A. Ferreira, F. M. Araújo, P. M. Mendes, and J. Higino Correia. "Fiber Bragg Grating Sensors Integrated in Polymeric Foils." Materials Science Forum 636-637 (January 2010): 1548–54. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.1548.

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Optical sensors have hit their maturity and a new kind of systems is being developed. This paper deals with the development of a new sensing structure based on polymeric foils and optic fiber sensors, namely the Fiber Bragg Grating sensors. Sensor integration in polymeric foils, using industrial process is the proposed goal. To achieve this goal, Finite Element Analysis was used for prototype modeling and simulation. The model was subjected to loads and restraints in order to retrieve information about stress distribution and displacement of specific points. From the simulation was possible to

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