2020-01-14 13h00: A. SLADEN et Y. HELLO, CNRS GEOAZUR

Title : Fiber optic cables for the study of the oceans and the Earth system

Distributed Acoustic Measurement (DAS) on optical fiber is a recent instrumental approach that allows to transform any optical fiber into a dense network (m) of seismo-acoustic sensors (0.1-1000Hz) over large distances (50km+). It is therefore a solution that can address the problems of cost, complexity and reliability of the best current systems for seafloor instrumentation. After an introduction to the technology and the presentation of the first results, we will discuss the current limitations and the envisaged and possible strategies to overcome them.