The lightwave signal of multiple wavelengths from the light amplifier and its manner and the transmission device and

摘要

PROBLEM TO BE SOLVED: To provide an optical amplification system capable of amplifying a plurality of signals that are wavelength-multiplexed and transmitted, to a proper level at each signal after wavelength separation.;SOLUTION: In a superordinate transmission apparatus 1 for receiving wavelength multiplexed signals formed of multiplexed optical signals of a plurality of wavelengths transmitted from subordinate transmission apparatuses 8, a wavelength demultiplexer section 7 demultiplexes the wavelength multiplexing signals into each of wavelength signals, and thereafter, each of reception amplifier control sections 6 always monitors an output level of each of reception amplifier sections 5 so that each wavelength signal stays within a predetermined prescribed level range and each of the reception amplifier control section 6 carries out level control so that the monitored level is within a range receptible by each of wavelength conversion sections 4 of the next stage.;COPYRIGHT: (C)2006,JPO&NCIPI