A study of the influence of external optical injection on a semiconductor laser diode

Semiconductor laser diodes can be altered to behave chaotically by imposing some sorts of nonlinearity such as an external optical injection. The operating parameters that control this behavior are the injection current, the injection level and the angular frequency detuning between the laser diode and the optical injected signal. In this work, we numerically study the effect of the variation of these operating parameters on the route to chaos. The results are illustrated in 3D phase diagram where the three axes (x.y.z) are the injection current, the frequency detuning and the injection level, respectively. Therefore, this phase diagram presents a map that can be used to select the required output of a semiconductor laser diode subjected to an external optical injection according to the required application.