Optical Chaos Generation and Synchronization in Secure Communication with Electro-Optic Coupling Mutual Injection

In order to solve the problem of key exposure in the laser chaotic system, an electro-optic coupled mutual injection chaotic system based on classical electro-optic intensity chaotic model is proposed in this paper. Firstly, the paper presents the simulation model of the system, and then analyzes the complexity, key hiding, key space size and communication robustness of the chaotic. The results show that the chaotic signal output by the system has a high degree of randomness. The power distribution in the spectrum is uniform; the output chaotic signal is complex, and the waveform is difficult to predict and decipher. In terms of secrecy performance, the key parameters can be effectively hidden under the physically achievable system gain. In addition, the communication system based on this structure maintains high sensitivity to key parameters, and has low sensitivity to the mismatch of common parameters, thus achieving better secrecy and synchronization effects.