☆ 4.7 Article

Millimetric spatial resolution time-expanded φ-OTDR

APL PHOTONICS (2023)

Time-expanded phase-sensitive optical time-domain reflectometry

Miguel Soriano-Amat et al.

Summary: The phase-sensitive optical time-domain reflectometry (phi OTDR) technique provides spatio-temporal measurements of environmental variables in real time, with a novel approach achieving cm-scale spatial resolutions over 1 km at remarkably low detection bandwidths. This approach utilizes dual-comb spectrometry and random phase-spectral coding to maximize signal-to-noise ratio for sensing schemes.

LIGHT-SCIENCE & APPLICATIONS (2021)

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Article Optics