A DISPERSION DETECTING METHOD,DEVICE AND AN OPTICAL SIGNAL TRANSMISSION SYSTEM

摘要

A dispersion detecting method can improve the shortage in the prior art that the dispersion detecting method and device have complex configuration and are not sensitive to the tiny dispersion.Said method has the following steps: attaining the signal in the preset bandwidth extent from the received optical signal; performing computation processing to the signal in the said preset bandwidth extent to attain the power computation value; educing the system dispersion value according to the corresponding relation between the power computation value and the system dispersion value. A dispersion detecting device is also provided. Said device includes an photoelectric filtering computation unit and a processing unit, the output terminal of said optical-electric filtering computation unit is connected to the input terminal of said processing unit. the dispersion detecting device of the invention can be used in the auto-adaptive dispersion compensation system, and an optical signal transmission system is also provided.