Phase-detected Brillouin optical correlation-domain reflectometry
Sign Up to like & getrecommendations! Published in 2018 at "Optical Review"
DOI: 10.1007/s10043-018-0436-1
Abstract: Optical fiber sensing techniques based on Brillouin scattering have been extensively studied for structural health monitoring owing to their capability of distributed strain and temperature measurement. Although a higher signal-to-noise ratio (leading to high spatial… read more here.
Keywords: brillouin optical; domain reflectometry; optical correlation; phase detected ... See more keywords
Distributed optical fiber sensing with Brillouin Optical Time Domain Reflectometry based on differential pulse pair
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2018.02.037
Abstract: Abstract The spatial resolution of the conventional Brillouin Optical Time Domain Reflectometry system is limited because of the limitation of probe pulse’s pulse-width. To improve the spatial resolution, a novel Brillouin Optical Time Domain Reflectometry… read more here.
Keywords: brillouin optical; domain reflectometry; time; time domain ... See more keywords
Brillouin Optical Correlation Domain Analysis Enhanced by Time-Domain Data Processing for Concurrent Interrogation of Multiple Sensing Points
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2017.2750174
Abstract: We propose and experimentally demonstrate a Brillouin optical correlation domain analysis system adopting time-domain data processing and differential measurement for simultaneous interrogation of multiple sensing points. Continuous probe and pulsed pump waves are simultaneously frequency-modulated… read more here.
Keywords: brillouin optical; correlation; sensing points; domain ... See more keywords
Real-Time Denoising of Brillouin Optical Time Domain Analyzer With High Data Fidelity Using Convolutional Neural Networks
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2018.2876909
Abstract: In recent years, many conventional image denoising techniques have been intensively studied to enhance the signal to noise ratio (SNR) of Brillouin optical time domain analyzer (BOTDA), due to their superior denoising performance to one-dimensional… read more here.
Keywords: time; brillouin optical; domain analyzer; time domain ... See more keywords
Non-Linear Interactions With Backscattered Light: A Truly Single-Ended Brillouin Optical Time-Domain Analysis Technique
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2019.2905668
Abstract: The non-linear interaction between a Rayleigh-backscattered wave and a forward-traveling optical pump pulse is explored using sources separated by approximately one Brillouin shift. It is shown that the pump pulse modulates the Rayleigh backscatter at… read more here.
Keywords: non linear; analysis; brillouin optical; time domain ... See more keywords
Narrowing Spectral Linewidth in Brillouin Optical Time Domain Analyzers With Adjustable Spatial Resolution
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2019.2910315
Abstract: In order to both adjust the spatial resolution (SR) and narrow the Brillouin gain spectrum (BGS) linewidth in Brillouin optical time domain analysis system, a novel scheme based on differential pulse pair technique is proposed.… read more here.
Keywords: linewidth brillouin; brillouin optical; time domain; spatial resolution ... See more keywords
Narrowing Brillouin gain spectrum for distortion-free Brillouin optical time-domain analyzers
Sign Up to like & getrecommendations! Published in 2018 at "Optical Engineering"
DOI: 10.1117/1.oe.57.6.066104
Abstract: Abstract. A high-performance Brillouin optical time-domain analysis (BOTDA) is achieved using the Brillouin gain bandwidth reduction technique combined with high injected probe power. In the probe branch, dual-tone probe wave with fixed frequency separation is… read more here.
Keywords: brillouin optical; probe; gain; brillouin gain ... See more keywords
Performance enhancement for a self-heterodyne detection Brillouin optical time-domain reflectometer
Sign Up to like & getrecommendations! Published in 2020 at "Optical Engineering"
DOI: 10.1117/1.oe.59.3.034103
Abstract: Abstract. Aiming at improving signal-to-noise ratio (SNR) and system performance for a Brillouin optical time-domain reflectometer (BOTDR) based on self-heterodyne detection of Rayleigh and Brillouin scattering lights, an approach assisted by modulating probe light and… read more here.
Keywords: time; brillouin optical; heterodyne detection; performance ... See more keywords
Noise reduction in a Brillouin optical time-domain sensor by a frequency-domain feature filter.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.449195
Abstract: A novel frequency-domain image processing method is proposed, to the best of our knowledge, to filter the noise from data collected by distributed optical fiber sensors based on Brillouin optical time-domain sensing (BOTDS). In the… read more here.
Keywords: frequency domain; time; frequency; filter ... See more keywords
Dynamic strain measurement with kHz-level repetition rate and centimeter-level spatial resolution based on Brillouin optical correlation domain analysis.
Sign Up to like & getrecommendations! Published in 2018 at "Optics express"
DOI: 10.1364/oe.26.006916
Abstract: In this paper, we propose and demonstrate an ultrahigh-speed Brillouin optical correlation domain analysis (BOCDA) with a single-position sampling rate of 200 kS/s and a spatial resolution of 8 cm. The Brillouin gain spectrum (BGS)… read more here.
Keywords: brillouin optical; optical correlation; spatial resolution; rate ... See more keywords
Curvature sensing with a D-shaped multicore fibre and Brillouin optical time-domain reflectometry.
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DOI: 10.1364/oe.383096
Abstract: A distributed curvature sensor based on Brillouin optical time-domain reflectometry interrogation technique in a D-shaped 7-core fibre is presented. By comparing the relative Brillouin frequency shift between the central core and three of the outer… read more here.
Keywords: brillouin optical; domain reflectometry; time domain; curvature ... See more keywords