Dual synchronization of chaos in one-way coupled microchip lasers

Abstract

We experimentally demonstrate the dual synchronization of chaos in two pairs of Nd:YVO(4) microchip lasers in a one-way coupling configuration over one transmission channel. Dual synchronization is achieved when the optical frequency is matched between the corresponding pairs of lasers by using injection locking. We investigate the influence of optical injection from the two master lasers to one slave laser, and found that the dual synchronization is observed when the injection locking is achieved between either of the master lasers and the slave laser. Under the condition of the injection locking between both of the master lasers and the slave laser, the injection locking is alternately achieved and the accuracy of dual synchronization is degraded. We also confirm these results by numerical calculation.

Generalized synchronization of chaos: experiments on a two-mode microchip laser with optoelectronic feedback

“…In recent years experiments such as those in Refs. [16][17][18][19][20][21][22][23][24][25] investigated identical synchronization of one-way coupled lasers and Refs. [26][27][28][29][30] investigated the case of mutually coupled systems.…”

Projective-dual synchronization in delay dynamical systems with time-varying coupling delay

“…Dual and cross dual synchronization of chaotic external cavity laser diodes have been investigated in [24]. Experimental and numerical dual synchronization of chaos in two pairs of one-way coupled microchip lasers using only one transmission channel were studied in [22]. Dual synchronization in modulated timedelayed systems is discussed in [25].…”

“…Dual synchronization in colpitts electronic oscillators is introduced [22]. Dual synchronization of the Lorenz and Rossler systems is studied in [23], where the output signal from the drive systems is a scalar signal, constructed by a linear combination of their states.…”

Dual synchronization of chaotic and hyperchaotic systems

“…To the best of our knowledge, there are few theoretical results about dual synchronization of chaotic systems, and on the other hand, all of the aforementioned methods [6,7,13,15,18] are mainly concerned with the dual synchronization of chaotic systems with low dimensional attractors characterized by one positive Lyapunov exponent and do not consist of the dual synchronization of hyperchaotic systems. This feature limits the complexity of the chaotic dynamics.…”

“…In dual synchronization technique, there is a pair of response systems that must be synchronized with pairs of drive systems by using a signal generated through linear combination of the drive systems states. Dual synchronization in colpitts electronic oscillators is studied in [18]. Dual and cross dual synchronization of chaotic external cavity laser diodes is investigated in [15].…”