Optomechanical time-domain reflectometry [PDF]
Nature Communications, 2018 Distributed fibre sensors are so far restricted to the monitoring of conditions within the core. Here, Bashan et al. introduce distributed optomechanical mapping of outside media, where light cannot reach. The sensor resolves forward stimulated Brillouin
Gil Bashan +4 more
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Time-expanded phase-sensitive optical time-domain reflectometry [PDF]
Light: Science & Applications, 2021 Phase-sensitive optical time-domain reflectometry (ΦOTDR) is a well-established technique that provides spatio-temporal measurements of an environmental variable in real time.
Miguel Soriano-Amat +6 more
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Phase-sensitive optical time domain reflectometry based on geometric phase measurement [PDF]
Scientific Reports, 2023 A phase-sensitive optical time domain reflectometer based on coherent heterodyne detection of geometric phase in the beat signal of light, is reported for the first time to our knowledge.
Sabahat Shaheen +2 more
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Application of Intensity-Based Coherent Optical Time Domain Reflectometry to Bridge Monitoring [PDF]
Sensors, 2022 Although distributed fiber sensing techniques have been widely used in structural health monitoring, the measurement results of bridge monitoring, particularly under destructive testing, have rarely been reported. To the best of our knowledge, this paper
Xin Lu +4 more
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Recent Advances in Brillouin Optical Time Domain Reflectometry [PDF]
Sensors, 2019 In the past two decades Brillouin-based sensors have emerged as a newly-developed optical fiber sensing technology for distributed temperature and strain measurements.
Qing Bai +7 more
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Hydraulic Conductivity of Saturated Soil Medium through Time-Domain Reflectometry [PDF]
Sensors, 2020 Time-domain reflectometry (TDR) has been extensively used to study soil behaviors. The objective of this study is to propose a method for measuring hydraulic conductivity using TDR. The dielectric constant deduced from TDR is influenced by the electrical
Seungjae Lee, Hyung-Koo Yoon
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A Phase-Sensitive Optical Time Domain Reflectometry with Non-Uniform Frequency Multiplexed NLFM Pulse [PDF]
Sensors, 2023 In the domain of optical fiber distributed acoustic sensing, the persistent challenge of extending sensing distances while concurrently improving spatial resolution and frequency response range has been a complex endeavor.
Zhengyang Li +5 more
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Analysis of Phase-Shift Pulse Brillouin Optical Time-Domain Reflectometry [PDF]
Sensors, 2019 Distributed strain and temperature can be measured by using local Brillouin backscatter in optical fibers based on the strain and temperature dependence of the Brillouin frequency shift.
Tsuneo Horiguchi +2 more
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Synthetic Spectrum Approach for Brillouin Optical Time-Domain Reflectometry [PDF]
Sensors, 2014 We propose a novel method to improve the spatial resolution of Brillouin optical time-domain reflectometry (BOTDR), referred to as synthetic BOTDR (S-BOTDR), and experimentally verify the resolution improvements.
Ken'ichi Nishiguchi +3 more
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Time-domain Statistics of the Electromagnetic Bias in GNSS-Reflectometry [PDF]
Remote Sensing, 2015 Global Navigation Satellite Systems-Reflectometry (GNSS-R) is an emerging remote sensing technique that uses navigation signals reflected on the Earth’s surface as sources of opportunity for scatterometry and altimetry.
Ali Ghavidel, Adriano Camps
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