Journal Article10.1109/JLT.2019.2916682
Interference Fading Elimination With Single Rectangular Pulse in $\Phi$ -OTDR
98
TL;DR: In this paper, a novel spectrum extraction and remix method is proposed to achieve fading-free operation for phase-sensitive optical time-domain reflectometry with heterodyne detection with a single rectangular probe pulse and makes full use of its spectral contents.
read more
Abstract: The interference fading, which is detrimental for signal retrieval in phase-sensitive optical time-domain reflectometry ( ${\Phi }$ -OTDR), is analyzed in frequency domain, and a novel spectrum extraction and remix method is proposed to achieve fading-free operation for ${\Phi }$ -OTDR with heterodyne detection. The operation principle is theoretically analyzed, and it is well confirmed by both simulation and experimental results. This method utilizes single rectangular probe pulse and makes full use of its spectral contents. Therefore, no complicated pulse modulation is required and the signal processing executed in digital domain is simple.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Distributed acoustic sensing for seismic activity monitoring
Maria R. Fernandez-Ruiz,Marcelo A. Soto,Ethan Williams,Sonia Martin-Lopez,Zhongwen Zhan,Miguel Gonzalez-Herraez,Hugo F. Martins +6 more
- 24 Mar 2020
TL;DR: Early approaches on the application of fiber-optic distributed acoustic sensors (DASs) for seismic activity monitoring are discussed and new experimental results on teleseism monitoring based on a specific approach: the so-called chirped-pulse DAS are illustrated.
Advances in phase-sensitive optical time-domain reflectometry
erforepsst,Jamile Forcelini,Harrison Watters,José Gabriel López-Antuñano,Lotte Slenders,Waleed Akhtar M Sultan +5 more
TL;DR: The phase sensitive optical time-domain reflectometry (Φ-OTDR) has attracted numerous attention due to its superior performance in detecting the weak perturbations along the fiber as mentioned in this paper .
105
Recent Advances in Phase-Sensitive Optical Time Domain Reflectometry (Ф-OTDR)
TL;DR: In this paper, the authors present a historical review of phase-sensitive optical time domain reflectometry (OTDR) and then summarize the recent progress of Ф-OTDR in the Fiber Optics Research Center (FORC) at University of Electronic Science and Technology of China (UESTC), which is the first group to carry out R&D of γ-OTD and invent ultra-sensitive DAS (uDAS) seismometer in China which is elected as one of the ten most significant technology advances of PetroChina in 2019.
Interference fading suppression in φ-OTDR using space-division multiplexed probes
TL;DR: By introducing the concept of SDM to φ-OTDR, the proposed novel interference fading suppression method avoids the complicated frequency or phase modulation, which has the advantages of simplicity, good effectiveness and high reliability.
65
Suppression of the Interference Fading in Phase-Sensitive OTDR With Phase-Shift Transform
TL;DR: In this paper, an approach of phase-shift transform is proposed and demonstrated to suppress the interference fading in phase sensitive optical time domain reflectometry (Φ-OTDR), which is executed in the digital domain and the complicated frequency modulation is not required.
59
References
Phase-detection distributed fiber-optic vibration sensor without fading-noise based on time-gated digital OFDR
Dian Chen,Qingwen Liu,Zuyuan He +2 more
TL;DR: A novel phase-detection DFVS is developed, which effectively eliminates the weak-fading-point and the relationship between phase noise and the intensity of backscattering is analyzed, and the inner-pulse frequency-division method and rotated-vector-sum method are introduced to effectively suppress phase noise.
250
Fading in heterodyne OTDR
TL;DR: In this article, the first and second-order statistics of the Rayleigh backscatter signal from a singlemode fiber under quasimonochromatic pulse excitation were derived.
244
High Sensitivity Distributed Vibration Sensor Based on Polarization-Maintaining Configurations of Phase-OTDR
TL;DR: In this article, a system based on all-polarization-maintaining configurations of the phase-sensitive optical time-domain reflectometry (OTDR) is presented for vibration sensing.
201
Toward Prevention of Pipeline Integrity Threats Using a Smart Fiber-Optic Surveillance System
Javier Tejedor,Hugo F. Martins,Daniel Piote,Javier Macias-Guarasa,Juan Pastor-Graells,Sonia Martin-Lopez,Pedro Corredera Guillen,Filip De Smet,Willy Postvoll,Miguel Gonzalez-Herraez +9 more
TL;DR: The results obtained are promising given the complexity of the task and open the path to future improvements toward fully functional pipeline threat detection systems operating in real conditions.
Principles of Digital Communication
R. Gallager
TL;DR: Communication has been one of the deepest needs of the human race throughout recorded history and became important with telegraphy, then telephony, then video, then computer communication, and today the amazing mixture of all of these in inexpensive, small portable devices.
165