Journal Article10.1364/ol.500587
Long-range distributed vibration sensing using phase-sensitive forward optical transmission.
George Q. Chen,K. Liu,Xing Rao,Yuhang Wang,Mamoona Khalid,Jun-nan He,Yiping Wang +6 more
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TL;DR: Long-range distributed vibration sensing using phase-sensitive forward optical transmission achieves a sensing range of up to 80 km and a position accuracy of 336 m.
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Abstract: Long-range vibration sensing is an important tool for real-time structural health monitoring. A new, to the best of our knowledge, design of a distributed fiber-optic vibration sensor is introduced and experimentally demonstrated in this study. The proposed system utilizes the transmission of light in the forward direction for sensing, and a self-interference method for laser source simplification. To extract vibration information from phase modulation of light, two Mach-Zehnder interferometers (MZIs) are employed with a 3 × 3 coupler-based differential cross multiplication algorithm for phase calculation. A folded double-ended detection configuration allows the time-of-flight difference via cross correlation (CC) to provide vibration positioning. Experimental results demonstrate a sensing range of up to ∼80 km without optical amplification, accompanied by a position accuracy of 336 m.
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Citations
150 km Single-span Distributed Vibration Sensor based on Compensated Self-interference Forward Transmission
Xing Rao,Yuhang Wang,Ming Chen,Kuan Liu,G. Y. Chen,Yiping Wang +5 more
TL;DR: Researchers propose a 150 km single-span distributed vibration sensor using a compensated self-interference forward transmission system, achieving a spatial resolution of 10 m and sensitivity of 12.2 mrad/μϵ for undersea earthquake monitoring.
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Long-range distributed vibration sensing using phase-sensitive forward optical transmission: publisher’s note
Chris Videll,Daniel Franzen +1 more
Abstract: This publisher's note contains corrections to Opt. Lett.48, 4825 (2023)10.1364/OL.500587.
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Distributed Sensing with Random Fiber Laser
Walter Margulis,Pedro Tovar,Marlon M. Correia,Anderson S. L. Gomes,Jean Pierre von der Weid +4 more
- 20 May 2024
Distributed Vibration Sensing Based on a Forward Transmission Polarization-Generated Carrier
Ming Chen,Xing Rao,Kuan Liu,Yuhang Wang,Shuqing Chen,Lin Xu,Rendong Xu,George Y. Chen,Yiping Wang +8 more
TL;DR: Researchers propose a distributed fiber-optic sensing system using a forward transmission-based polarization-generated carrier, achieving a sensitivity of 0.63 mrad/με and a limit of detection of 355.6 pε/Hz1/2 at 60 Hz, with a sensing distance of 131.5 km and positioning accuracy of 725 m.
References
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TL;DR: This work demonstrates the first time that distributed vibration sensing is realized over such a long distance without inserting repeaters, and the novel hybrid amplification scheme in this work can also be incorporated in other fiber-optic sensing systems for extension of sensing distance.
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Optical Fiber Distributed Acoustic Sensors: A Review
Zuyuan He,Qingwen Liu +1 more
TL;DR: In this paper, the principles involved in DAS system, including three types of reflectometry to locate the Rayleigh backscattering (RBS) along the fiber, and the methods to recover the vibration waveform by the phase or spectrum of RBS.
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