US 2006/0039703 A1Published application

Wavelength division multiplexing optical transmission system

AssigneeFujitsu Limited

InventorsToru Katagiri, Takao Naito

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Abstract

The objective of the present invention is to realize a chromatic dispersion compensation method which does not depend on a wavelength path in a photonic network to which a HUB node is applied and its monitoring control. In order to achieve this purpose, the present invention controls a plurality of variable chromatic dispersion compensators arbitrarily disposed in the photonic network based on the measured results of a plurality of chromatic dispersion monitors arbitrarily disposed in the photonic network and wavelength path information kept by the network management system which manages the entire photonic network. Here, the variable chromatic dispersion compensator within the network that should be controlled and the chromatic dispersion compensated quantity thereof are determined based on the measured results of the chromatic dispersion monitor and the wavelength path information kept by NMS.

Claims11

Dependent claims

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.

3 more elements

A wavelength division multiplexing optical transmission system where 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 said optical transmitting end device, said optical amplification repeater, said optical switching device and said optical receiving end device;

wherein said 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 provided with a memory which stores configuration information of the network comprising layout information and connection information of each device configuring said wavelength division multiplexing optical transmission system and the path information of the signal optical wavelength;
means for computing the position and chromatic dispersion compensated quantity of the variable chromatic dispersion compensator with which said optical amplification repeater, said optical switching device or said optical receiving end device are provided based on the measured results of the accumulated chromatic dispersions of each signal optical wavelength by said chromatic dispersion monitor and the path information of said signal optical wavelength;
a chromatic dispersion compensated quantity controller which sets the chromatic dispersion according to said computed chromatic dispersion compensated quantity at the variable chromatic dispersion compensator is provided.

2 more elements

Dependencies are inferred from the claim text.