Fig. 1. Experimental setup for chaotic laser generation and amplification

Fig. 2. Output power-pump current curve and spectra of chaotic laser. (a) Output power-pump current curve; (b) spectra

Fig. 3. Time series and autocorrelation curves of chaotic laser at different pump currents. (a) (b) 340 mA; (c) (d) 800 mA

Fig. 4. Permutation entropies of chaotic laser

Fig. 5. Output power-pump current curves and spectra during amplification process. (a) Output power-pump current curves of different pump currents of chaotic laser during amplification process; (b) spectra during amplification process when pump current of chaotic laser is 400 mA

Fig. 6. Permutation entropies of different pump currents of chaotic laser during amplification process

Fig. 7. Skewnesses and kurtoses of different pump currents of chaotic laser during amplification process. (a) Skewness; (b) kurtosis