Patent ID: 6282017
Filing Date: 2001-08-28
Classification: H01S,H04B,H04J

Abstract:
An optical communication system for transmitting WDM (wavelength-division multiplexing) signal light via an optical transmission line, comprising:a first terminal station including a plurality of optical transmitters outputting optical signals having different wavelengths, and a multiplexer wavelength-division multiplexing said optical signals to output WDM signal light to the optical transmission line;a second terminal station receiving said WDM signal light from the optical transmission line; andan optical repeater provided in said optical transmission line, said optical repeater comprising an optical amplifier amplifying said WDM signal light, a detector detecting an output level of said optical amplifier, and a controller controlling said optical amplifier so that said output level detected becomes a target level, said target level being constant irrespective of the number of said optical transmitters being operated.