Wavelength path multiplexing/demultiplexing apparatus and wavelength path multiplexing/demultiplexing method

摘要

In order to connect a path and a transponder with low loss, reduce an apparatus cost, reduce an apparatus size, and improve a reliability of an apparatus, a wavelength path multiplexing/demultiplexing apparatus comprises multiplexing/demultiplexing unit having a multiplexing port through which a wavelength multiplexed light is inputted and outputted and a demultiplexing port in which the wavelength multiplexed light is demultiplexed into the lights included in the wavelength multiplexed light based on the wavelength and through which the light is inputted and outputted and first switch unit which have a first port to which the demultiplexing port is connected and a second port and connect the second port to one of the first ports; and the demultiplexing port is connected to the first port of each of the first switch unit and the first port is connected to the demultiplexing port of each of the multiplexing/demultiplexing unit.

主权项

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:
a first wavelength-multiplexing/demultiplexing unit that comprises a multiplexing port through which the wavelength multiplexed light is inputted and outputted and a demultiplexing port through which the lights included in said wavelength multiplexed light are inputted and outputted while corresponding to the wavelength; anda second switch unit that has a third port and a fourth port and in which a connection relationship between said third port and said fourth port can be changed in said second switch unit,wherein said demultiplexing port is connected to said third port and said fourth port is connected to said first port; 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 log2 (M/N) is an integer; and 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 log2 (M/N) stages of said 2×1 optical switching element.