Wavelength path demultiplexing method and wavelength path demultiplexer

摘要

In order to be able to be well connected with low loss and a transponder with the route, to reduce the equipment cost, and compact device, to enhance the reliability of the device, wavelength path demultiplexing device, input wavelength multiplexed light demultiplexing means comprising, an isolated port is input to the multi-port output, light included in the multi-wavelength light is separated based on wavelength, and, a first port isolated port is connected, and , and a second port comprises a switching means, the first to be connected with any of the first port, a second port, separate port is connected to a first port of the first switching means different and the first port is connected to the isolated port of the demultiplex unit different.