Patent ID: 7146066

Claim:
A wavelength division multiplexing optical transmission system provided with an optical transmitting end device, an optical amplification repeater, an optical switching device which performs an optical branched insertion or an optical path shifting of an optical signal as is, and an optical receiving end device are connected with an optical fiber, and which has a network management system which integrally manages the optical transmitting end device, the optical amplification repeater, the optical switching device and the optical receiving end device; wherein the optical transmitting end device is provided with the chromatic dispersion monitor at its input stage; at least one optical amplification repeater disposed between the optical transmitting end device and the optical switching device, between the optical switching devices, between the optical switching device and the optical receiving end device, or the optical transmitting end device and the optical receiving end device, the optical switching device or the optical receiving end device is provided with a variable chromatic dispersion compensator; said network management system is a wavelength division multiplexing optical transmission system which is provided with a memory which stores configuration information of the network including the path information of the signal optical wavelength, layout information and connection information of each device configuring the wavelength division multiplexing optical transmission; and a unit for computing the chromatic dispersion compensated quantity and position of the variable chromatic dispersion compensator with which the optical amplification repeater, the optical switching device or the optical receiving end device is provided based on the measured results of the accumulated chromatic dispersions of each signal optical wavelength by the chromatic dispersion monitor and the path information of the signal optical wavelength; a chromatic dispersion compensated quantity controller which sets the chromatic dispersion according to said computed chromatic dispersion compensated quantity to the variable chromatic dispersion compensator is provided.