Analysis of a novel sensor interrogation technique based on fiber cavity ring-down (CRD) loop and OTDR
Sign Up to like & getrecommendations! Published in 2018 at "Optical Fiber Technology"
DOI: 10.1016/j.yofte.2018.04.005
Abstract: Abstract We present the analysis of a remote sensor based on fiber Cavity Ring-Down (CRD) loop interrogated by an Optical Time Domain Reflectometer (OTDR) taking into account both practical limitations and the related signal processing.… read more here.
Keywords: based fiber; otdr; ring crd; cavity ring ... See more keywords
80 km Fading Free Phase-Sensitive Reflectometry Based on Multi-Carrier NLFM Pulse Without Distributed Amplification
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2019.2919671
Abstract: Long range phase-sensitive optical time domain reflectometer (ϕ-OTDR) sensing mainly employs distributed amplification in the sensing fiber. It requires the light to be injected into both ends of the sensing fiber, which reduces the degree… read more here.
Keywords: distributed amplification; phase sensitive; range; amplification ... See more keywords
High-Resolution Chirped-Pulse φ-OTDR by Means of Sub-Bands Processing
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2020.2981741
Abstract: Conventional chirped-pulse (CP) phase-sensitive optical time-domain reflectometry (CP φ-OTDR) allows the interrogation of tens of kilometers of optical fiber with high accuracies of millikelvin or nanostrain. With respect to standard coherent-detection φ-OTDR, it shows increased… read more here.
Keywords: resolution; chirped pulse; spatial resolution; sub bands ... See more keywords
Monitoring Distance Enhancement With Chaotic Laser for OTDR System
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2023.3340181
Abstract: We propose and experimentally demonstrate an enhancement method on the optical fiber attenuation measurement range which is only by replacing the light source with a chaotic laser in the traditional optical time domain reflectometry (OTDR)… read more here.
Keywords: distance; otdr; monitoring distance; chaotic laser ... See more keywords
Distributed vibration sensor with a lasing phase-sensitive OTDR.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.476182
Abstract: The authors experimentally demonstrate the operation of a lasing phase-sensitive optical time-domain reflectometer (Φ-OTDR) based on random feedback from a sensing fiber. Here, the full output of the laser provides the sensing signal, in contrast… read more here.
Keywords: lasing phase; phase sensitive; vibration sensor; distributed vibration ... See more keywords
Voiceprint and position information detection of non-cooperative ship with Φ-OTDR and suspended sensitized optical cable.
Sign Up to like & getrecommendations! Published in 2024 at "Optics express"
DOI: 10.1364/oe.520478
Abstract: Target detection is significant in many fields, including oceanic security, marine ecology, etc. In this paper, phase sensitive optical time domain reflectometry (Φ-OTDR) is introduced for the non-cooperative ship detection, with large-scale diversity technology and… read more here.
Keywords: detection; cooperative ship; otdr; ship ... See more keywords
Crosstalk analysis in quantum networks: detection and localization insights with photon counting OTDR.
Sign Up to like & getrecommendations! Published in 2025 at "Optics express"
DOI: 10.1364/oe.560153
Abstract: Leveraging pre-existing classical fiber optic infrastructure, particularly optical fibers, and their associated component technologies, is essential for the practical realization of future quantum networks. However, when adapting such infrastructure for quantum communication, optical crosstalk from… read more here.
Keywords: otdr; crosstalk; quantum networks; network ... See more keywords
Static DFOS: pushing towards the limits of chirped-pulse phase-sensitive OTDR.
Sign Up to like & getrecommendations! Published in 2025 at "Optics express"
DOI: 10.1364/oe.572296
Abstract: Phase-sensitive optical time domain reflectometry (Φ-OTDR) techniques allow for distributed measurements of various physical quantities involving local optical path variations along optical fibers, typically in response to either strain or temperature changes. Chirped-pulse (CP) Φ-OTDR… read more here.
Keywords: otdr; chirped pulse; phase sensitive; static dfos ... See more keywords
Ultra-low sampling resolution technique for heterodyne phase-OTDR based distributed acoustic sensing.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.456925
Abstract: Phase-sensitive optical time-domain reflectometry (Φ-OTDR) based on heterodyne detection is widely used for its simple structure and high signal-to-noise ratio (SNR). However, the large amount of raw data of Φ-OTDR places a heavy burden on… read more here.
Keywords: heterodyne; sampling resolution; phase; low sampling ... See more keywords
Concise method for high-precision vibration recovery of Φ-OTDR based on the GF-FastICA algorithm.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.478931
Abstract: To efficiently restore the vibration signals of a phase-sensitive optical time domain reflectometer (Φ-OTDR), the GF-FastICA joint algorithm is proposed, which combines guided filtering with fast independent component analysis (FastICA). The marked region of vibration… read more here.
Keywords: high precision; method high; concise method; vibration ... See more keywords
SNR improvement in time-expanded phase-sensitive OTDR using Nyquist zone averaging.
Sign Up to like & getrecommendations! Published in 2024 at "Optics letters"
DOI: 10.1364/ol.543115
Abstract: A recent advancement in distributed sensing known as the time-expanded phase-sensitive optical time-domain reflectometry (TE Φ-OTDR) addresses the trade-off between spatial resolution and detection bandwidth, enabling centimeter-scale resolution alongside RF detection bandwidth in the order… read more here.
Keywords: expanded phase; otdr; time; phase sensitive ... See more keywords