A chaotic signal generation device with time-delay feature suppression

Abstract

The present invention provides a kind of time-delay feature suppressed chaotic signal generating device, comprising: a time-delay feature-suppressed chaotic signal generating module and an acquisition and analysis module; said time-delay feature-suppressed chaotic signal generating module outputs an optical signal from WRC-FPLD It is divided into two branches through the fiber coupler, and the two branches are finally combined and input to the fiber coupler to form two filter external cavity feedback loops. By adjusting the center wavelength of the adjustable filter in the two external cavities, the laser can be Output chaotic signals of different wavelengths; by adjusting the cavity lengths of the two external cavity feedback loops so that the difference between the cavity lengths is approximately equal to half of the relaxation oscillation time of the laser, the chaotic signal output with tunable wavelength delay characteristics suppression is realized; The collection and analysis module adjusts the working temperature and working current of the WRC‑FPLD by collecting the output signal of the chaotic signal generation module. This application uses WRC‑FPLD as a laser source to realize chaotic signal output of different wavelengths, which is beneficial to its application in WDM communication systems.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a chaotic signal generating device for suppressing delay characteristics. Background technique [0002] Semiconductor lasers (SLs) can output rich nonlinear dynamical behaviors such as single-period, period-doubling, and chaos under one or more external disturbances such as optical feedback, optical injection, and photoelectric feedback. In particular, SLs based on optical feedback are easy to output high-dimensional and complex chaotic signals, thus providing high-quality chaotic signal sources for chaotic secure communication and high-speed random number acquisition. However, the chaotic signal obtained based on optical feedback SLs may have obvious delay characteristic peaks, which greatly hinders the application of chaotic signal in chaotic secure communication and random number acquisition. In terms of chaotic secure communication, the obvious characteristic ...

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Problems solved by technology

This greatly limits its application in chaotic secure communication systems such as WDM

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