Ring network made using a dual optical data bus

The invention relates to an optical ring network comprising stations ( 340 ) which are connected to at least one optical fiber by means of optical couplers, the two ends of the optical fiber being connected to a point of presence or an optical network access node. The point of presence comprises (k) at least an optical emitter ( 330 - 1 ) which emits a falling optical signal having at lest one first wavelength ( 420 ) in the direction of one end of the optical fibers ( 455 ) and (ii) at least one optical receiver ( 330 - 2 ) which receives a rising optical signal having at least one second wavelength which is different form the first wavelength. The aforementioned optical network access node comprises means such as a hub ( 320 ) which can be used for the communication between the optical receiver ( 330 - 2 ) and the optical emitter ( 330 - 1 ). The wavelengths of the rising signals and the wavelengths of the falling signals are shared by several stations.