DURIP L-band interrogator for distributed acoustic sensing (DAS) of active fibers in Arctic coastal zones
Abstract
Distributed Acoustic Sensing (DAS) is a new technology of interest for the oceanographic research community, which allows seafloor fiber optic cable to act like thousands of high-resolution sensors using high-frequency laser pulses. The environments and locationsover which DAS can be applied on existing seafloor cables is limited by the technology of most interrogators on the market, which can only utilize so-called #dark fibers#. We propose acquiring a new system on the market, an L-band interrogator and field system, which enables measurement of #active fibers# in cables. The list of potential applications include sensing of ocean surface waves andcurrents, sediment transport, marine mammal vocalization, earthquakes, and coastal groundwater. In particular, application in coastal Arctic and mid-latitude regions has demonstrated ability to measure ocean surface waves at notably higher spatial resolution thanwith any other method, allowing novel quantification of wave-driven processes. The purchased instrument will be immediately useful to support ONR-funded experiments in Arctic coastal regions, providing high-resolution observations of waves and landfast sea ice breakout. The ability to combine sensing of such an array of processes with a single fiber optic cable opens the door for a myriad of research applications in a diversity of locations.Publicly releasable
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 14, 2024
- Source ID
- N000142512026
Entities
People
- Madison Smith
Organizations
- Office of Naval Research
- United States Navy
- Woods Hole Oceanographic Institution