We demonstrate continuous distributed acoustic sensing over a 4400km long undersea cable. Bi-directional operation improves the strain signal-to-noise rate by >20dB, enabling 88000 50-m-spaced measurement points at a nominal telecom launch power.
Cite
@article{arxiv.2603.15828,
title = {High-Resolution Trans-Oceanic Distributed Acoustic Sensing Enabled by a Bi-Directional Sensor Implementation},
author = {Mikael Mazur and Nicolas K. Fontaine and Roland Ryf and Martin Karrenbach and Kristopher McBrian and Keith McLaughlin and Brian Sperry and Anuar Butler and Valey Kamalov and Lauren Dallachiesa and Ells Burrows and David Winter and Haoshuo Chen and Jeewan Naik and Kishore Padmaraju and Ajay Mistry and David Neilson},
journal= {arXiv preprint arXiv:2603.15828},
year = {2026}
}
Comments
3 pages, 2 figures. Proceedings of the Optical Fiber Communication Conference (OFC), Post-Deadline paper Th4C.7 2026