HAL (France)
open access
Evaluation of Distributed Acoustic Sensing (DAS) Systems with Polarization Diversity for Railway Infrastructure: Effects of Fiber Type and Installation Conditions on System Performance
Distributed Acoustic Sensing (DAS) systems based on ϕ-OTDR are increasingly used for real-time infrastructure monitoring, but their performance is limited by coherent and polarization fading, which create signal blind spots along the fiber. This study evaluates two coherent-detection DAS architectur
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