Research on chaotic secure communication system based on all optical chaos injection double-loop electro-optical phase feedback loop
To solve the problem of large feedback gain coefficient required for delay feature hiding in existing chaotic se-cure laser communication systems,a chaotic secure communication system based on all optical chaos injection double-loop electro-optical phase feedback loop was designed.Firstly,optical chaos was generated by all optical feedback and coupled to two electro-optic phase chaos feedback loops.Then,the nonlinear coupling of information and chaotic carrier was achieved through phase modulation to participate in the generation of chaotic carrier.Finally,the signal was de-crypted by optical chaos synchronization at the detection end.The complexity,TDS hiding,synchronization,robustness and communication performance of chaotic signals in the system were analyzed by MATLAB software.The results dem-onstrate that the designed chaotic secure communication system has higher complexity and the TDS are completely hid-den when the feedback coefficient is small.