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  1. Article

    Open Access

    Brillouin expanded time-domain analysis based on dual optical frequency combs

    Brillouin Optical Time-Domain Analysis (BOTDA) is a widely-used distributed optical fiber sensing technology employing pulse-modulated pump waves for local information retrieval of the Brillouin gain or loss s...

    Jae Hyeong Youn, Kwang Yong Song, Sonia Martin-Lopez… in Light: Science & Applications (2024)

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  2. No Access

    Article

    A hybrid cascade-parallel discriminative-generative model for pipeline integrity threat detection in a smart fiber optic surveillance system

    This paper presents an advanced system for the continuous monitoring of potential threats in a long gas pipeline. For signal acquisition, phase-sensitive optical time domain reflectometry (

    Javier Tejedor, Javier Macias-Guarasa, Hugo F. Martins… in Multimedia Tools and Applications (2024)

  3. Article

    Open Access

    Vertical Displacement Measurement in a Slow-Moving Sinkhole Using BOTDA

    The effectiveness of monitoring and early-warning systems for ground deformation phenomena, such as sinkholes, depends on their ability to accurately resolve the ongoing ground displacement and detect the subt...

    Pascual Sevillano, Javier Preciado-Garbayo, Jorge Sevil… in Photonic Sensors (2023)

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  4. Article

    Open Access

    Time-expanded phase-sensitive optical time-domain reflectometry

    Phase-sensitive optical time-domain reflectometry (ΦOTDR) is a well-established technique that provides spatio-temporal measurements of an environmental variable in real time. This unique capability is being l...

    Miguel Soriano-Amat, Hugo F. Martins, Vicente Durán… in Light: Science & Applications (2021)

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