Study of the optical phenomena in a 10 km long optically powered data link dedicated to a submarine cabled observatory

We describe a 10 km long optically powered data link dedicated to a submarine cabled observatory. A single optical fiber is deployed to both transmit the exchanged data and the energy to supply the remote instrument. We focus on the optical phenomena which occur in the optical fiber due to the presence of the high optical power, and its superimposition with the optical data streams. We study the advantages, the constraints and the limits of such a system, and we determine the best configuration to collect the maximum electrical power after the O/E conversion, and to transmit the data with the best quality.