Fig. 1. Schematic of simulating chaos synchronization by eavesdropping construction

Fig. 2. Simulation results of common signal-induced chaos synchronization for legitimate users. (a) Optical spectra; (b) power spectra; (c) time sequence; (d) scatter plot

Fig. 3. Simulation results of eavesdropping reconstruction of common signal-induced chaos synchronization. (a) Optical spectra;

Fig. 4. Chaos synchronization coefficient after eavesdropping construction and intercepting power percentage versus EDFA gain

Fig. 5. Effect of internal laser parameter mismatch on eavesdropping synchronization. (a) Δε; (b) ΔN₀; (c) Δα

Fig. 6. C and C_E versus transmission distance

Fig. 7. Experimental setup

Fig. 8. States of driving and response lasers. (a) Static optical spectra; (b) optical spectrum of chaotic driving signal; (c) static power spectra; (d) power spectrum of chaotic driving signal

Fig. 9. Common signal-induced chaos synchronization for legitimate user and eavesdropper. (a) Optical spectra; (b) power spectra ;