RESEAU EN ANNEAU REALISE A PARTIR D'UN BUS OPTIQUE DOUBLE

摘要

The invention relates to an optical ring network comprising stations (340) which are connected to at least one optical fibre by means of optical couplers, the two ends of the optical fibre being connected to a point of presence or an optical network access node. The point of presence comprises (i) at least on optical emitter (330-1) which emits a falling optical signal having at least one first wavelength (420) in the direction of one end of the optical fibres (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 from 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.