Multi-channel chaotic synchronization communication system in simple topologcial structure

Abstract

The invention discloses a multi-channel chaotic synchronization communication system in a simple topological structure. The output of a semiconductor laser which is operated in a chaotic state is uniformly divided into two parts, and the two parts are injected into two mutual injection lasers which are connected by n different-time-delay bidirectional optical fiber branches respectively through two same unidirectional optical fiber branches; under an injection-locking effect of unidirectional injection, stable and high-quality chaotic synchronization can be realized between the two multiple-time-delay mutual injection lasers; and accordingly, each mutual injection laser can synchronously send n pieces of information and receive n pieces of information, so that the multi-channel chaotic synchronization communication is realized. By the multi-channel chaotic synchronization communication system, the chaotic synchronization is extremely easily realized in a multiple-time-delay mutual injection system in a simple structure, and the problem that the injection and feedback are required to conform to a strict mathematical relation for realizing the synchronization in the conventional multiple-time-delay mutual injection system is solved. Moreover, the multi-channel chaotic synchronization communication system supports multi-information simultaneous bidirectional transmission between the two lasers and has a guiding significance for chaotic network communication.

Description

technical field [0001] The invention relates to the fields of chaos, optical fiber communication and semiconductor lasers, in particular to a multi-channel chaos synchronous communication system with a simple topological structure, which is suitable for simultaneous two-way parallel secure transmission of multiple information. Background technique [0002] The chaotic synchronous communication based on inter-injection semiconductor lasers has simultaneous two-way transmission characteristics and high security, and the multi-delay inter-injection semiconductor laser system is one of the optimal systems for realizing multi-channel chaotic synchronous communication. Realization of stable high-quality chaos synchronization under injection conditions. The synchronization of multi-delay mutual injection systems has recently been reported (A. Englert, W. Kinzel, et al. Zero lag synchronization of chaotic systems with time delayed couplings, Physic Review Letters 104, 114102, 2010; ...

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Problems solved by technology

The synchronization of multi-delay mutual injection systems has recently been reported (A. Englert, W. Kinzel, et al. Zero lag synchronization of chaotic systems with time delayed couplings, Physic Review Letters 104, 114102, 2010; M. Zigzag, M .Butkovshi, A.Englert, etal.Zero-lag synchronization and multiple time delays in two coupled chaotic systems, Physics Review E 81, 036215, 2010), but its chaotic synchronization requires feedback parameters and mutual injection parameters to meet strict mathematical relations, and The generated chaotic signal is a low-frequency oscillating chaotic signal, and the synchronization quality will decrease when the chaotic signal strength decreases, which is difficult to apply to information transmission. These factors severely limit the realization and implementation of chaotic synchronization communication based on multi-delay mutual injection real application

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