High-speed signal frequency equalization and chirp management method based on single optical filter

Abstract

The invention discloses a high-speed signal frequency equalization and chirp management method based on a single optical filter. Specifically, the method comprises the steps of conducting the optical modulation on a high-speed signal by a signal transmission device to obtain a modulated optical signal; filtering the optical signal by a single optical filter, wherein the stop band of the optical filter is corresponding to the wavelength part of the spectrum of the high-speed signal that is close to a carrier; and transmitting the filtered optical signal to a signal receiving device. According to the technical scheme of the invention, based on the filtering effect of the single optical filter, the frequency equalization of the optical signal is realized, while the requirement on the bandwidths of transmitting and receiving devices is lowered. The spectrum shaping effect of the single optical filter also solves the chirp problem during the direct signal-modulation process. In this way, a direct modulation laser still enables the long-distance optical fiber transmission during the modulation process of the high-speed signal. The system cost is effectively reduced. Moreover, the method enables the direct signal-modulation of the high-speed signal at a speed of 25 Gb / s on the basis of the conventional 10 Gb / s, and realizes the smoothly upgrading process. Therefore, the method is better in backward compatibility.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a high-speed signal frequency equalization and chirp management method based on a single optical filter. Background technique [0002] With the popularization and development of the Internet, the traffic of communication data is increasing year by year, and the transmission capacity of optical fiber communication, one of the pillars of communication technology, needs to be continuously improved. The increase of system capacity can usually be achieved in two ways, that is, increasing the number of wavelengths and increasing the single-wavelength rate; among them, the single-wavelength rate increase is to be able to support higher transmission rates, which requires the transmitting and receiving devices to support higher modulation and reception rate. Single-wavelength rate improvement involves two technologies: (1) high-bandwidth photoelectric modulation and photodetect...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is how to use low-cost devices and simple modulation and demodulation technology to realize high-speed signal modulation and perform dispersion management on high-speed signals when increasing the single-wavelength rate to increase the capacity of the optical fiber communication system

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