Real-time phase-recording DAS in 171 km low-loss fiber

Ole Henrik Waagaard,Erlend Ronnekleiv,Aksel Haukanes, Frantz Stabo-Eeg, Dag Thingbø, Stig Forbord,Svein Erik Aasen,Jan Kristoffer Brenne

optical fiber sensors conference（2021）

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摘要

We demonstrate sustained real-time phase-recording distributed acoustic sensing (DAS) in 148 km standard SMF28e and 171 km low-loss OFS TeraWave SCUBA 125 fibers without inline amplification. Low noise and high optical dynamic range are obtained by combining swept frequency interrogation and a very low phase noise laser.

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关键词

fiber,das,low-loss low-loss,real-time,phase-recording

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