Method for designing multi-level pulse amplitude modulation signal all-optical shaper

Abstract

The invention discloses a method for designing a multi-level pulse amplitude modulation signal all-optical shaper.First an MZI shaping module is determined according to the number of regenerated levels, so as to achieve a function of shaping multi-level pulse amplitude modulation (PAM) signals; and the gain of a linear matching optical amplifier is adjusted according to the difference between degradation input multi-level PAM signal power and the working range of the MZI shaping module, so that the degradation multi-level PAM optical signal power is matched with the working range of the MZI shaping module.The MZI shaping module is a core of the all-optical shaper and can be implemented through a nonlinear optical medium and mainly achieve the multi-level PAM signal shaping function.Therefore, the problem of signal degradation of the multi-level PAM signals in an optical fiber communication system is solved, the transmission distance of the multi-level PAM signals is lengthened, and powerful support is provided for long-distance effective transmission of the multi-level PAM optical signals in the optical fiber communication system.

Description

technical field [0001] The invention belongs to the technical field of all-optical information processing, and more specifically relates to a design method of an all-optical shaper for multi-level pulse amplitude modulation signals. Background technique [0002] In optical fiber communication systems, with the continuous improvement of transmission bandwidth and speed requirements, optical-electrical-optical conversion technology can no longer meet the demand, and all-optical information processing technology has become the direction of future development. In an all-optical communication system, due to the ASE noise accumulation of optical amplifiers, fiber dispersion, fiber nonlinear effects, and interaction within or between channels, the optical signal is degraded, which seriously affects the quality of communication and limits To improve the capacity and transmission distance of the communication system, it is necessary to regenerate the degraded optical signal. At prese...

AI Technical Summary

Problems solved by technology

Compared with OOK optical signals, multi-level PAM optical signals are more sensitive to degradation factors such as fiber dispersion, ASE, and nonlinearity, which limits the transmission distance of multi-level PAM optical signals to a certain extent

At present, most all-optical shapers are designed for OOK optical signals, and their implementation schemes and corresponding design methods are difficult to directly apply to multi-level PAM signals.

In fact, it is much more difficult to implement an all-optical shaper for multi-level PAM signals, one of the reasons is the lack of a more general design method to guide

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