Enhanced Sensitivity High Spatial Resolution Distributed Acoustic Sensing Using Optical Frequency Domain Reflectometry and a Point Reflector Array Sensor

Stephen Kreger; Derek Rountree; Jaewon Park; Andrei Donko; Martynas Beresna; Ali Masoudi; Gilberto Brambilla

doi:10.1364/OFS.2020.T3.75

Optical Fiber Sensors Conference 2020 Special Edition
OSA Technical Digest (Optica Publishing Group, 2020),
paper T3.75
•https://doi.org/10.1364/OFS.2020.T3.75

Enhanced Sensitivity High Spatial Resolution Distributed Acoustic Sensing Using Optical Frequency Domain Reflectometry and a Point Reflector Array Sensor

Stephen Kreger, Derek Rountree, Jaewon Park, Andrei Donko, Martynas Beresna, Ali Masoudi, and Gilberto Brambilla

Optical Fiber Sensors 2020

Washington, DC United States
8–12 June 2020
ISBN: 978-1-55752-307-5

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Poster Session I (T3)

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S. Kreger, D. Rountree, J. Park, A. Donko, M. Beresna, A. Masoudi, and G. Brambilla, "Enhanced Sensitivity High Spatial Resolution Distributed Acoustic Sensing Using Optical Frequency Domain Reflectometry and a Point Reflector Array Sensor," in Optical Fiber Sensors Conference 2020 Special Edition, G. Cranch, A. Wang, M. Digonnet, and P. Dragic, eds., OSA Technical Digest (Optica Publishing Group, 2020), paper T3.75.

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Abstract

Acoustics can be sensed with high spatial resolution by analyzing fiber Rayleigh scatter with optical frequency domain reflectometry, but signal-to-noise levels are low. Writing an array of discrete reflectors in fiber with a fs-pulsed laser increases returned light and leads to significant improvements in signal-to-noise levels and dynamic range.

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