An optical high-speed transmission

The invention relates to an optical transmission device comprising at least one main node (1) receiving signals from one or several wire communication networks and converting them into optical signals, in addition to at least one optical transmission line (2) transmitting wavelength multiplexed optical signals and extending between the main node (1) and a coupler (3). Said device comprises individual optical transmission lines (4) each of which extends between the coupler (3) and a transmitting/receiving user terminal (5), the coupler (3) being an optical module separating different wavelengths in order to distribute them on different individual transmission lines (4). The invention is characterized in that the coupler (3) is an interferential optical filter type coupler.