Investigation of chaotic synchronization of VCSELs subjected to anisotropic optical injection

Chaotic synchronization characteristics of the vertical-cavity surface-emitting lasers subjected by anisotropic optical injection are numerically investigated. First of all, the synchronization quality of the x-linear polarization (LP) mode and the y-LP mode are both periodically changed with the angle θ between the polarizer and the light axes. Second, in a enough large scale region of the feedback coefficient and the injection current, each LP mode can be obtained good synchronization quality when the angle θ exists in the former half periods region., in the case that their synchronization quality are independent of the polarization states of the lasers output. However, each LP mode can be achieved very instable and inferior synchronized quality, which is caused by the angle θ in latter half periods range.

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