In a chirped-pulse-based distributed acoustic sensor, we show that exploiting both the amplitude and phase of the fiber fingerprint enables more than a 2-fold reduction in the noise floor, achieving <5 n epsilon strain noise in a 32 km link. (c) 2025 The Author(s)
Performance Comparison of Direct and Coherent Detection in Correlation-Based Distributed Fiber-Optic Acoustic Sensing
Orsuti D.
;Palmieri L.;Schenato L.;Santagiustina M.;Cappelletti M.;Galtarossa A.;
2025
Abstract
In a chirped-pulse-based distributed acoustic sensor, we show that exploiting both the amplitude and phase of the fiber fingerprint enables more than a 2-fold reduction in the noise floor, achieving <5 n epsilon strain noise in a 32 km link. (c) 2025 The Author(s)
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