LAUSR

Abstract This paper shows a complex nonlinear dynamics of an optically injected laser diode (LD) directly modulated by electrical current from a resonant tunneling diode (RTD) circuit. The LD model evolves a new control parameter called effective gain coefficient (EGC) and can switch between a free-running laser and a perturbed laser. A bifurcation diagram analysis sustained Lyapunov exponents’ spectra reveals chaotic and quasi-periodic dynamics for restricted ranges of the frequency f i n and by EGC variations, including the generation of the hyperchaotic regime and multiscroll chaotic attractors through a cascade of periodic oscillations to the chaos. Moreover, an implementation of this new coupled system also shows that when an AC signal V a c sin ⁡ 2 π f i n t is added to the DC voltage bias, the LD outputs show several optical signals such as periodic, coherence collapse and chaotic regimes with different strange complex attractors which are devoted to more improve secure optical telecommunications.