Fig. 1. Schematic diagram of optical feedback semiconductor laser system

Fig. 2. Schematic diagram of optical injection-optical feedback semiconductor laser system

Fig. 3. Maximum Lyapunov exponent as a function of feedback strength of optical feedback semiconductor laser system

Fig. 4. Attractors of laser intensity in phase space for various linewidth enhancement factor $\alpha$. Simulation method of photoelectric field amplitude-phase decomposition for system when (a) $\alpha$=3 and (c) $\alpha$=8;simulation method of photoelectric field real-imaginary part solution for system when (b) $\alpha$=3 and (d) $\alpha$=8. Two-dimensional phase space consists of laser intensity $I\left(t\right)=E^{\mathrm{2}}\left(t\right)$ and carrier density $N\left(t\right)$

Fig. 5. Maximum Lyapunov exponent as a function of feedback strength with optical injection-optical feedback semiconductor laser system

Fig. 6. Attractors of laser intensity in space for various linewidth enhancement factor $\alpha$. Simulation method of photoelectric field amplitude-phase decomposition for system when (a) $\alpha$=3 and (c) $\alpha$=8;simulation method of photoelectric field real-imaginary part solution for system when (b) $\alpha$=3 and (d) $\alpha$=8. Two-dimensional phase space consists of laser intensity $I\left(t\right)=E^{\mathrm{2}}\left(t\right)$ and carrier density $N\left(t\right)$

Fig. 7. Feedback term of semiconductor laser system with optical injection-optical feedback using different decomposition calculation methods. (a) Amplitude-phase decomposition calculation method; (b) real-imaginary part solution calculation method

Fig. 8. Phase feedback terms at different feedback intensities of amplitude-phase simulation method in optical injection-optical feedback semiconductor laser system. (a) $\kappa$=3.106 ns^-1; (b) $\kappa$=4.659 ns^-1; (c) $\kappa$=6.212 ns^-1

Fig. 9. Phase feedback items at different linewidth enhancement factors of amplitude-phase simulation method in optical injection-optical feedback system. (a) $\alpha$=3; (b) $\alpha$=5; (c) $\alpha$=8

Table 1. Parameters of semiconductor laser system