Generator of optical chaotic signals for broadband

Abstract

The invention provides a generator of optical chaotic signals for broadband. The generator of optical chaotic signals for broadband comprises a shifting register module, a signal modulation module, a microwave photonic filter, a nonlinear transformation module, a sampling quantitative module and a clock control module. An input end of the signal modulation module is connected to an output end of the shifting register module. An input end of the microwave photonic filter is connected to an output end of the signal modulation module. An input end of the nonlinear transformation module is connected to an output end of the microwave photonic filter. A first input end of the sampling quantitative module is connected to an output end of the nonlinear transformation module while a second input end is connected to an output end of the clock control module. An output end of the sampling quantitative module is connected to a second input end of the shifting register module. A first input end of the shifting register module is connected to the output end of the clock control module. According to the generator of optical chaotic signals for broadband, system status can be completely decided by an initiative value of the shifting register, so that problems in the prior art that synchronization robustness of an analog chaotic system is poor and the bandwidth of digital chaotic signals is narrow are solved.

Description

technical field [0001] The invention belongs to the technical field of communication security, and more specifically relates to a device for generating broadband optical chaotic signals. Background technique [0002] Chaos-based physical layer encryption has become a very active research field and has attracted much attention from scholars. As the basic component of system security, the design of chaos source is very important. There are currently two main types of chaotic systems: analog chaotic systems and digital chaotic systems. Analog chaotic systems, especially optical analog chaotic systems, can generate broadband noise-like signals with high complexity. However, in practical applications, the synchronization robustness of simulated chaotic systems still faces great challenges. At the same time, the parameter sensitivity of the chaotic system conflicts with the synchronization of the system, which makes it difficult to satisfy the security and practical feasibility...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a broadband optical chaotic signal generating device, aiming to solve the problems of poor robustness of the existing analog chaotic synchronization and narrow bandwidth of the digital chaotic signal

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