Abstract
We propose and numerically demonstrate broadband chaos generation based on vertical-cavity surface-emitting lasers (VCSELs) subject to intensity-modulated (IM) optical injection. Herein, we consider two scenarios, i.e., parallelly-polarized IM optical injection (PPIOI) and orthogonally-polarized IM optical injection (OPIOI). Specifically, we investigate the effect of injection parameters (injection strength and frequency detuning) and modulation parameters (modulation depth and modulation frequency) on the chaotic dynamic behaviors. The results confirm that both PPIOI and OPIOI can enhance the chaotic regions, bandwidth, and correlation dimension (CD) compared with continuous-wave (CW) optical injection. Besides, OPIOI seems to be more beneficial for obtaining chaotic signals with broader bandwidth and higher dimension compared with PPIOI. Therefore, this study paves the way for prosperous potential in the chaos-based applications.
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