Effect on spin-VCSEL dynamics and bandwidth under different external control conditions

In this paper, we study the changes in the dynamic state and bandwidth of spin-polarized vertical-cavity surface-emitting lasers (VCSELs) in the free-running state when they are injected by another spin-VCSEL in different working states. The study theoretically investigates the chaos interval, bandwidth change, and complexity change concerning continuous wave (CW) injection, period-one (P1) injection, and period-two (P2) injections. The simulation results indicate that modifications to the external control parameters significantly affect the dynamic range of the spin-VCSEL, leading to an expansion of the chaotic range as the complexity of the external injection terms increases. Finally, by carefully modifying the external control parameters, it becomes feasible to operate the spin-VCSEL in a desired state.