Method and device for electrical equalization processing of optical signals and optical fiber communication system

Abstract

The embodiment of the invention provides a method and a device for electrical equalization processing of optical signals and an optical fiber communication system. The method for the electrical equalization processing of the optical signals comprises the following steps: dividing input optical signals into N channels of optical signals, wherein N is an integer more than or equal to 2; performing bandpass filtration on the N channels of optical signals, wherein center frequencies of frequency bands used for performing the bandpass filtration on the N channels of optical signals are not exactlythe same, and the passband range of the frequency bands and the spectrum range of the N channels of optical signals are partially overlapped; converting the N channels of optical signals after the bandpass filtration into N channels of corresponding analog electric signals; and performing electrical equalization processing on the N channels of analog electric signals to output an electrical equalization processing result for the optical signals. Correspondingly, the embodiment of the invention provides the device for the electrical equalization processing of the optical signals and the opticalfiber communication system. The method and the device for the electrical equalization processing of the optical signals and the optical fiber communication system can reduce the requirement on the optical signal to noise ratio under a certain standard of the residual dispersion value and the error rate so as to improve the dispersion tolerance of the electrical equalization processing device.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an optical signal electrical equalization processing method, device and optical fiber communication system. Background technique [0002] Optical fiber communication technology has become one of the main pillars of modern communication and plays a pivotal role in modern telecommunication networks. Its rapid development and wide range of applications in recent years are rare in the history of communication, and it is also an important symbol of the world's new technology revolution. And the main transmission tool of various information in the future information society. [0003] Dispersion is an important factor affecting the performance of optical communication systems. Although dispersion can be compensated by dispersion compensating fiber in the optical domain, it is difficult to accurately compensate the dispersion of each channel optical signal in a wavelength divisio...

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Problems solved by technology

[0010] In the process of realizing the present invention, the inventors found that the linearity of the optical fiber communication system using the traditional electrical equalization technology in the prior art is relatively poor, and the requirements for the optical signal-to-noise ratio are relatively high in order to ensure a certain bit error rate under the given residual dispersion condition. High, small dispersion tolerance

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