Introduction to Interferometry of Fiber Optic Strain Measurements

This is a Preprint and has not been peer reviewed. This is version 2 of this Preprint.


Download Preprint

Supplementary Files

Eileen Martin, Nathaniel Lindsey, Jonathan Ajo-Franklin, Biondo Biondi


Distributed acoustic sensing (DAS) measures the average axial strain (strain rate) along a subset of a fiber optic cable, as opposed to the particle displacement (velocity) at a particular small point sensor. In shifting from measuring a vector field to a tensor field, DAS changes the directional sensitivity of measurements of every type of seismic wave when compared to single component geophones, particularly Love and S waves.We show this through theoretical analysis of planar Rayleigh, Love, P- and S-waves over both infinitesimally small and realistic gauge lengths. We extend the analysis of individual sensor detection of surface plane waves waves to inter-receiver cross-correlations of these detections. Finally we simulate random sources distributed around particle velocity and axial strain sensors in several configurations. The extraction of Rayleigh wave signals from ambient noise interferometry is more straightforward than Love wave signals, but with some receiver geometries and source distributions both Rayleigh and Love wave arrival times may be extracted.



Applied Mathematics, Earth Sciences, Geophysics and Seismology, Other Applied Mathematics, Physical Sciences and Mathematics


Distributed acoustic sensing, ambient noise interferometry, fiber optic sensors, Green's function estimation, imaging science


Published: 2018-06-15 03:54

Older Versions

CC BY Attribution 4.0 International

Add a Comment

You must log in to post a comment.


There are no comments or no comments have been made public for this article.