OPTICAL WAVELENGTH MULTIPLEX TRANSMISSION SYSTEM

PROBLEM TO BE SOLVED: To provide an optical wavelength multiplex transmission system capable of arbitrarily setting and changing the wavelength and a route of an Add/Drop signal. SOLUTION: An optical signal Add part includes a first circling AWG including 2n input ports and 2n output ports, and is configured to input an Add signal of an optional wavelength to be outputted to an objective transmission path to a predetermined input port of the first circling AWG to be outputted to an output port in accordance with the input port as a WDM signal, and connects the WDM signal of each output port of the first circling AWG to an Add port of a photo-coupler connected to the objective transmission path. An optical signal Drop part includes a second circling AWG including 2n input ports and 2n output ports, and is configured to input a WDM signal branched to a Drop port to a predetermined input port of the second circling AWG to be branched and output to an output port corresponding to the input port, and connects Drop signals of the respective output ports of the second circling AWG to predetermined receivers to be received. COPYRIGHT: (C)2011,JPO&INPIT