On data communication in two-level schemes of optically coupled chaotic lasers

Two-level schemes for data communication are proposed in which the upper level consists of phase-matched chaotic lasers synchronously perturbing the generation dynamics of a transmitter and receiver at the lower level and forming the communication link. For four schemes (with radiation injection from the controlling level to the controlled level, with mutual radiation injection between the two levels, and with a random synchronous perturbation of the pump-period modulation of lasers at the controlled level in each of the above schemes), the signal recovery errors are studied numerically depending on the coupling coefficients between the levels. It is shown that the recovery errors are minimal only for controlled receivers and the code functions reconstructed on them are close to the specified function.