Patent ID: 7343065

Claim:
An optical signal transfer method of transferring an optical signal train, which has been transmitted via a predetermined transmission path, to transmission paths, among a plurality of transmission paths, that correspond to routing information contained in the optical signal, the optical signal transfer method comprising: an input step of inputting the optical signal train, to which the routing information have been applied, to the main optical signal amplifying triode unit; a wavelength conversion step of supplying control light of wavelengths, corresponding to signals indicating the routing information, to the main optical signal amplifying triode unit, and making optical signals of the wavelengths of the control light be output from the main optical signal amplifying triode unit; and an optical distribution step of inputting the optical signals, output from the main optical signal amplifying triode unit, into an optical distributor and distributing the optical signals according to their wavelengths among the plurality of optical transmission paths connected to the optical distributor.