Dispersion compensation method and device

Abstract

A dispersion compensation method and device are used for compensating dispersion in an optical fiber communication system. The method includes: the receiving end of the optical fiber communication system determines the one-to-one correspondence between multiple optimal phase compensation values ​​and the multiple subcarrier signals in the first multi-carrier signal to be transmitted by the transmitting end of the optical fiber communication system; the receiving end generates indication information, The indication information includes a one-to-one correspondence between multiple optimal phase compensation values ​​and multiple subcarrier signals in the first multi-carrier signal; the receiving end sends the generated indication information to the transmitting end; the transmitting end receives the indication information sent by the receiving end , and according to the one-to-one correspondence, a plurality of optimal phase compensation values ​​are used to perform phase compensation on a plurality of sub-carrier signals in the first multi-carrier signal to obtain a second multi-carrier signal; modulation to obtain a first optical signal; the transmitting end sends the first optical signal to the receiving end.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a dispersion compensation method and device. Background technique [0002] With the continuous development of mobile Internet technology, optical fiber communication system is widely used in the signal transmission process due to its high speed and large capacity. The dispersion of optical signals in optical fiber links has always been the main problem restricting the performance of optical fiber communication systems. [0003] In order to solve the dispersion problem of the optical signal in the optical fiber link, in the prior art, the transmitting end performs dispersion compensation on the signal to be transmitted according to the estimated dispersion value, and transmits the dispersion-compensated signal to the receiving end to reduce the optical intensity received by the receiving end. The degree of dispersion of the signal. For example: assuming that ...

AI Technical Summary

Problems solved by technology

[0004] In the existing technical solutions for dispersion compensation in optical fiber links, since the dispersion value of the signal to be transmitted at the transmitting end for dispersion compensation is estimated, factors such as the type, length, and phase noise of the optical fiber link will affect the actual The dispersion value that should be compensated for dispersion is affected. Therefore, under the premise that the above-mentioned factors are unknown, only the estimated dispersion value is used for dispersion compensation of the signal to be transmitted, and the dispersion in the optical fiber link cannot be accurately compensated.

[0005] In summary, the existing technical solutions for dispersion compensation in optical fiber links have the problem of inaccurate dispersion compensation values

Images