Fig. 1. Model of chaos synchronization communication based on dual-path mutual coupling DFB semiconductor laser

Fig. 2. Output chaos optical characteristics of single-path mutual coupling and dual-path mutual coupling systems with the same parameters. (a) Sequence diagram of single-path mutual coupling; (b) sequence diagram of dual-path mutual coupling; (c) spectrum of single-path mutual coupling; (d) spectrum of dual-path mutual coupling; (e) autocorrelation function of single-path mutual coupling; (f) autocorrelation function of dual-path mutual coupling

Fig. 3. Curves of mutual information function. (a) Single-path mutual coupling; (b) dual-path mutual coupling

Fig. 4. Effect of frequency detuning on bandwidth

Fig. 5. Waveforms of sine wave signal before and after detuning. (a) Before detuning; (b) after detuning