Polarization-resolved dynamics of asymmetrically coupled vertical-cavity surface-emitting lasers

Polarization-resolved dynamics of mutually coupled vertical-cavity surface-emitting lasers with asymmetrical injections is studied. For one laser, the injection parameters, such as injection rate, lasing frequency, and propagation phase, are set to fixed values, while for the other laser these parameters are taken as variables. The results show that asymmetrical injections have great influence on the dynamics and polarization state of the system. Subjected to injections with different degrees of asymmetry, the lasers can experience bifurcations in the original polarization, polarization switching to the orthogonal direction, or emission with both of the two linearly polarized modes.