AN ELECTRICAL EQUALIZING PROCESSING METHOD AND APPARATUS FOR OPTICAL SIGNAL AND AN OPTICAL FIBER COMMUNICATION SYSTEM

摘要

An electrical equalizing processing method and device for optical signal and an optical fiber communication system are provided. The electrical equalizing processing method for optical signal includes the following steps. An input optical signal is split into N channels of optical signals, in which N is an integer greater or equal to 2; band-pass filtering is performed on the split N channels of optical signals, in which central frequencies of a frequency band used in the performing of band-pass filtering on the N channels of optical signals are not exactly the same, and a passband of the frequency band and a frequency spectrum range of the N channels of optical signals overlap; the N channels of optical signals on which band-pass filtering is performed are converted into corresponding N channels of an analog electrical signal; an electrical equalizing process is performed on the N channels of the analog electrical signal to output an optical signal electrical equalizing processing result. The method, device and system can reduce the requirement of optical signal to noise ratio under a certain residual dispersion value and an error rate standards, thereby improving a dispersion margin of the electrical equalizing processing device.