High-Resolution Trans-Oceanic Distributed Acoustic Sensing Enabled by a Bi-Directional Sensor Implementation
arXiv:2603.15828
Abstract
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.
3 pages, 2 figures. Proceedings of the Optical Fiber Communication Conference (OFC), Post-Deadline paper Th4C.7 2026