Results 1 to 10 of about 1,111 (187)

Distributed Impact Wave Detection in Steel I-Beam with a Weak Fiber Bragg Gratings Array [PDF]

Sensors, 2023
In this paper, acoustic, dynamic and static strain variations along a steel I-beam generated by an impact load are reconstructed simultaneously within a single measurement.
Yuan Wang, Neil A. Hoult, Joshua E. Woods, Hannah Kassenaar, Xiaoyi Bao   +4 more
doaj   +2 more sources

Narrow linewidth short cavity Brillouin random laser based on Bragg grating array fiber and dynamical population inversion gratings

Results in Physics, 2018
We report on random lasing observed with 100-m-long fiber comprising an array of weak FBGs inscribed in the fiber core and uniformly distributed over the fiber length.
S.M. Popov, O.V. Butov, Y.K. Chamorovski, V.A. Isaev, P. Mégret, D.A. Korobko, I.O. Zolotovskii, A.A. Fotiadi   +7 more
doaj   +3 more sources

Recent Advances in Ultra-Weak Fiber Bragg Gratings Array for High-Performance Distributed Acoustic Sensing (Invited) [PDF]

Sensors
Distributed acoustic sensing (DAS) systems have been widely employed in oil and gas resource exploration, pipeline monitoring, traffic and transportation, structural health monitoring, hydrophone usage, and perimeter security due to their ability to ...
Yihang Wang, Baijie Xu, Guanfeng Chen, Guixin Yin, Xizhen Xu, Zhiwei Lin, Cailing Fu, Yiping Wang, Jun He   +8 more
doaj   +2 more sources

Spectral and Microscopic Behavior of Type III Femtosecond Fiber Bragg Gratings at High Temperatures [PDF]

Micromachines
Fiber Bragg gratings are key components for optical fiber sensing applications in harsh environments. Microvoids, or so-called type III fiber Bragg gratings, fabricated using femtosecond lasers and the point-by-point technique, were characterized at high
Matilde Sosa, Maxime Cavillon, Thomas Blanchet, Matthieu Lancry, Guillaume Laffont   +4 more
doaj   +2 more sources

Multimode Graded Index Fiber with Random Array of Bragg Gratings and Its Raman Lasing Properties

Fibers, 2023
Light propagation in multimode fibers is known to experience various nonlinear effects, which are being actively studied. One of the interesting effects is the brightness enhancement at the Raman conversion of the multimode beam in graded index (GRIN ...
Alexey G. Kuznetsov, Alexey A. Wolf, Zhibzema E. Munkueva, Alexander V. Dostovalov, Sergey A. Babin   +4 more
doaj   +3 more sources

Probing the dispersive properties of optical fibers with an array of femtosecond-written fiber Bragg gratings

Scientific Reports, 2022
We propose an efficient method to determine the effective refractive index of step-index optical fibers from the visible to the mid-IR and thus allowing to infer their dispersive properties over a broad spectral range.
Tommy Boilard, Réal Vallée, Martin Bernier   +2 more
doaj   +4 more sources

Design of a Clip-On Modular Tactile Sensing Attachment Based on Fiber Bragg Gratings: Theoretical Modeling and Experimental Validation [PDF]

Sensors
Despite widespread modular tooling in robots and automated systems, tactile sensing lags behind, constrained by custom and non-interchangeable sensors. To close this gap, we developed a clip-on cylindrical tactile module that combines a snap-fit Clip-on ...
Fengzhi Zhao, Yan Feng, Min Xu, Yaxi Li, Hua Zhang   +4 more
doaj   +2 more sources

Model-Based Position and Reflectivity Estimation of Fiber Bragg Grating Sensor Arrays [PDF]

Sensors, 2018
We propose an efficient model-based signal processing approach for optical fiber sensing with fiber Bragg grating (FBG) arrays. A position estimation based on an estimation of distribution algorithm (EDA) and a reflectivity estimation method using a ...
Stefan Werzinger, Darko Zibar, Max Köppel, Bernhard Schmauss   +3 more
doaj   +6 more sources

FIBER OPTIC MEASUREMENT SYSTEM FOR DETERMINATION OF EXTENDED OBJECT POSITION AND BENDS IN 3D SPACE [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2020
Subject of Research. Fiber optic measurement systems are widely used in various industries. Most of these systems are fiber optic devices for detecting physical quantities.
Daria A. Egorova, Andrey V. Kulikov, Azamat B. Mukhtubaev, Mikhail Yu. Plotnikov   +3 more
doaj   +1 more source

CENTRAL WAVELENGTH ADJUSTMENT OF LIGHT EMITTING SOURCE IN INTERFEROMETRIC SENSORS BASED ON FIBER-OPTIC BRAGG GRATINGS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2015
The paper is focused on the investigation of fiber-optic interferometric sensor based on the array of fiber Bragg gratings. Reflection spectra displacement mechanism of the fiber Bragg gratings under the external temperature effects and the static ...
A. S. Aleynik, A. Y. Kireenkov, M. V. Mekhrengin, M. A. Chirgin, M. N. Belikin   +4 more
doaj   +1 more source