Patent ID: 8886050
Filing Date: 2014-11-11
Classification: H04B,H04J

Abstract:
1. A device for residual dispersion compensation of wavelength division multiplexing system, characterized in, comprising a performance parameter detecting device, a central control device and a tunable dispersion compensator control device, wherein the performance parameter detecting device is used for receiving and detecting a performance parameter of a receiving terminal optical signal, wherein the optical signal includes a highest wavelength channel and a lowest wavelength channel, and sending a detecting result of the performance parameter to the central control device, wherein the detecting result is the performance parameters for only the highest and the lowest wavelength channels; the central control device is used for deciding a dispersion regulating mode of first and second tunable dispersion compensators according to the detecting result of the performance parameter and sending the dispersion regulating mode to the tunable dispersion compensator control device through control signaling; and the tunable dispersion compensator control device is used for receiving the control signaling sent by the central control device and adjusting dispersion compensation amounts of the first and second tunable dispersion compensators according to the control signaling in order to make residual dispersion of the highest and lowest wavelength channels satisfy requirements of dispersion tolerance of corresponding first and second optical receivers; wherein the dispersion compensation amount of the first and second tunable dispersion compensators, when the residual dispersion of the highest and lowest wavelength channels satisfies the requirements of dispersion tolerance of the first and second optical receivers, is used to adjust dispersion compensation amount of a third tunable dispersion compensator of an adjacent wavelength channel having a wavelength greater than the lowest wavelength channel and less than the highest wavelength channel to satisfy a requirement of dispersion tolerance of a third optical receiver.