A direct detection fiber optic distributed acoustic sensor with a mean SNR of 7.3 dB at 102.7 km

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buir.contributor.authorUyar, Faruk
buir.contributor.authorOnat, Talha
buir.contributor.authorÜnal, Canberk
buir.contributor.authorKartaloğlu, Tolga
buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.issueNumber6en_US
dc.citation.volumeNumber11en_US
dc.contributor.authorUyar, Faruken_US
dc.contributor.authorOnat, Talhaen_US
dc.contributor.authorÜnal, Canberken_US
dc.contributor.authorKartaloğlu, Tolgaen_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.contributor.authorÖzdür, İ.en_US
dc.date.accessioned2020-02-06T07:41:24Z
dc.date.available2020-02-06T07:41:24Z
dc.date.issued2019
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractIn this work, we present the experimental results of a direct detection π-OTDR based distributed acoustic sensor system. The system uses two cascaded acousto-optic modulators in order to generate optical pulses with very high extinction ratio and dual photodetector scheme for high dynamic range. The proposed schemes are investigated in detail and their performance enhancement is experimentally verified. Four piezoelectric based fiber stretchers are placed on a ~104 km single-mode test fiber at the distances of 1 km, 10 km, 87 km and 102.7 km and used for perturbation tests. The stretchers generated vibration signals which are analyzed to quantify the system performance. The signal-to-noise ratio (SNR) of vibration signals at the monitored distances is measured over the 12-hour recorded data within 34-second time windows considering the multi-point random interference of scattered light and fading phenomena. Using the 12-hour data, SNR histograms at four different locations are generated and mean SNR values are obtained. The signals received from 102.7 km has a maximum SNR of 24.7 dB and a mean SNR of 7.3 dB with a spatial resolution of 15 m. To the best of our knowledge, this is the highest-range reported direct detection π-OTDR based distributed acoustic sensor system.en_US
dc.identifier.doi10.1109/JPHOT.2019.2948211en_US
dc.identifier.issn1943-0655
dc.identifier.urihttp://hdl.handle.net/11693/53114
dc.language.isoEnglishen_US
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US
dc.relation.isversionofhttps://dx.doi.org/10.1109/JPHOT.2019.2948211en_US
dc.source.titleIEEE Photonics Journalen_US
dc.subjectFiber optic systemsen_US
dc.subjectOptical sensorsen_US
dc.subjectPhase sensitive optical time domain reflectometryen_US
dc.subjectRayleigh scatteringen_US
dc.titleA direct detection fiber optic distributed acoustic sensor with a mean SNR of 7.3 dB at 102.7 kmen_US
dc.typeArticleen_US
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