Patent ID: 9154254
Filing Date: 2015-10-06
Classification: H04J,H04Q

Abstract:
1. A wavelength path multiplexing/demultiplexing apparatus comprising: a multiplexing/demultiplexing unit that has a multiplexing port through which a wavelength multiplexed light is inputted and outputted, and a demultiplexing port in which said wavelength multiplexed light is demultiplexed into the lights included said wavelength multiplexed light based on the wavelength and through which the light is inputted and outputted; and a first switch that has a first port to which said demultiplexing port is connected and a second port and in which said second port is connected to one of said first ports; wherein said demultiplexing port is connected to said first port of each of said first switch unit and said first port is connected to said demultiplexing port of each of said multiplexing/demultiplexing unit; wherein said multiplexing/demultiplexing unit comprises: wherein when the number of said multiplexing/demultiplexing unit is N, the total number of the wavelengths used in said multiplexing/demultiplexing unit is M, and a value of log wherein said first switch unit and said second switch unit include a single M×N optical matrix switch in which N stages of said 2×2 optical switching element is connected to log