Journal ArticleDOI
Distributed sensor based on dark-pulse Brillouin scattering
TLDR
In this article, a novel dark-pulse-based technique has been used for the first time in a Brillouin scattering-based distributed fiber sensor, which is capable of strain and temperature measurement as conventional pulse-based systems but at much higher spatial resolution.Abstract:
A novel dark-pulse-based technique has been used for the first time in a Brillouin scattering-based distributed fiber sensor. Experimentally obtained Brillouin spectra demonstrate that the dark-pulse configuration is as capable of strain and temperature measurement as conventional pulse-based systems but at much higher spatial resolution. A spatial resolution of 50 mm is reported with a strain measurement accuracy of 6 /spl mu//spl epsiv/ on a 100-m sensing fiber.read more
Citations
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Journal ArticleDOI
Recent progress in distributed fiber optic sensors.
Xiaoyi Bao,Liang Chen +1 more
TL;DR: A sensor with centimeter spatial resolution and high precision measurement of temperature, strain, vibration and birefringence can find applications in aerospace smart structures, material processing, and the characterization of optical materials and devices.
Journal ArticleDOI
Proposal of Brillouin optical correlation-domain reflectometry (BOCDR)
TL;DR: A Brillouin optical correlation-domain reflectometry (BOCDR), which can measure the distribution of strain and/or temperature along an optical fiber from a single end, by detecting spontaneous BrillouIn scattering with controlling the interference of continuous lightwaves is proposed.
Journal ArticleDOI
Brillouin Distributed Fiber Sensors: An Overview and Applications
TL;DR: A review focused on real world applications of Brillouin distributed fiber sensors is presented and some works to face the two main technical challenges (large dynamic range and higher spatial resolution) are commented.
Journal ArticleDOI
A Review of Distributed Fibre Optic Sensors for Geo-Hydrological Applications
TL;DR: In this article, the application of distributed optical fiber sensors to geo-hydrological monitoring is reviewed and discussed, along with basic principles and main acquisition techniques, and the emphasis is placed on those related to soil levees, slopes/landslide, and ground subsidence that constitute a significant percentage of current geohazards.
Journal ArticleDOI
Going beyond 1000000 resolved points in a Brillouin distributed fiber sensor: theoretical analysis and experimental demonstration
TL;DR: This work proposes and experimentally demonstrate an ultimately optimized distributed fiber sensor capable of resolving 2100000 independent points, which corresponds to a one-order-of-magnitude improvement compared to the state- of-the-art.
References
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Journal ArticleDOI
Distributed fiber Brillouin strain sensing with 1-cm spatial resolution by correlation-based continuous-wave technique
Kazuo Hotate,M. Tanaka +1 more
TL;DR: In this article, the spatial resolution of Brillouin strain sensing was improved by the correlation-based continuous-wave technique, which is applicable to smart structures or materials as a nervous system to monitor strain distribution.
Journal ArticleDOI
SBS threshold of a fiber with a Brillouin frequency shift distribution
TL;DR: In this article, the SBS threshold of a fiber with Brillouin frequency shift distribution along its length is investigated theoretically and experimentally, and a simple equation for estimating the sBS threshold from the effective gain coefficient, which is calculated by using the frequency distribution along the length of the fiber.
Journal ArticleDOI
Brillouin optical-fiber frequency-domain analysis for distributed temperature and strain measurements
TL;DR: In this paper, a spatial resolution of 3 m was achieved for a 1 km-long single-mode fiber for a single-input single-output (SISO) channel.
Journal ArticleDOI
Characterization of the Brillouin-loss spectrum of single-mode fibers by use of very short (<10-ns) pulses.
TL;DR: It was found that the Brillouin-loss signal intensity is linearly related to the duration of the pump pulse used to obtain the spectrum, and three distinct behaviors were observed in the spectral linewidth.
Proceedings ArticleDOI
Distributed sensing using stimulated Brillouin scattering : towards ultimate resolution
TL;DR: The fundamental limitations of the SBS analysis as a distributed sensing method when the spatial resolution is in the meter range are discussed and a novel experimental configuration is presented that reaches the best performances achievable for this kind of sensors.