Wavelength-multiplexed optical transmission device, wavelength-multiplexed optical transmission system, wavelength-multiplexed optical transmission method

摘要

Provided is a wavelength division multiplexing (WDM) optical transmission device which is suitable of performing splitting, wavelength multiplexing, switching, and routing on an optical WDM signal in which optical signals having a spectrum close to a rectangle are arranged with a high density, and efficiency of spectral usage is ultimately high in units of wavelengths. A WDM optical transmission device according to the present invention is configured to cause flat portions of adjacent transmission bands on a wavelength spectrum overlap each other.

主权项

1. A wavelength division multiplexing (WDM) optical transmission device that performs wavelength division multiplexing on first and second optical signals whose wavelength bands on a wavelength spectrum are adjacent to each other such that wavelength band spacing on the wavelength spectrum is almost zero, and transmits the first and second optical signals via an optical fiber transmission path, comprising:
a wavelength selective switch (WSS) node that selects any one of the first and second optical signals and distributes the selected optical signal to any one of first and second optical fiber transmission paths, wherein the WSS node performs the distributing such that a transmission bandwidth of a first transmission band when the first optical signal is output to the first optical fiber transmission path is larger than a wavelength spectrum width or an allocation frequency band of the first optical signal, and a transmission bandwidth of a second transmission band when the second optical signal is output to the second optical fiber transmission path is larger than a wavelength spectrum width or an allocation frequency band of the second optical signal, and the WSS node is configured to cause a sum of a transmission bandwidth of the first transmission band from a center wavelength of the first transmission band to a termination at a side facing the second transmission band and a transmission bandwidth of the second transmission band from a center wavelength of the second transmission band to a termination at a side facing the first transmission band to be larger than a wavelength spectrum width from a center wavelength of the first optical signal to a center wavelength of the second optical signal.