Dual synchronization of chaos in microchip lasers

Abstract

We have achieved dual synchronization of chaos in two pairs of one-way coupled Nd:YVO4 microchip lasers, using only one transmission channel, by experiment and numerical calculation. We observed the individual synchronization of chaos in each pair of two lasers by adjusting the optical frequencies for injection locking between the corresponding pairs. The achievement of dual synchronization is dependent on the injection-locking condition, which is different from the locking condition for a single pair of lasers because of the presence of an additional injection signal from the master laser of the other pair.

Synchronization of chaos in microchip lasers and its communication applications

“…In this subsection, we describe the experimental demonstration of dual synchronization of chaos in two pairs of Nd:YVO 4 microchip lasers in a coherent coupling configuration over one transmission channel, [14,15]. The optical frequency of each laser is changed and the condition of injection locking is controlled to achieve dual synchronization between the corresponding pairs in the transmitters and the receivers.…”

Long-haul dense wavelength division multiplexing between a chaotic optical secure channel and a conventional fiber-optic channel

“…Argyris et al successfully realized a field trial of chaotic optical communication for a transmission rate of 1 Gbits ∕ s and bit error rate of 10 −7 in a 120 km commercial single optical fiber [6], which is a milestone for chaotic optical communication. During recent years, the research issues for chaotic optical communication mainly focus on the chaotic photonic integrated circuits (PICs) [15], multiplexing [16], bidirectional communication [17], bandwidth enhancement [18], security analysis [19], transmission rate increase [20], generation of novel chaotic carriers [21,22], etc. Multiplexing can realize multiple-channel transmission in a single optical fiber to economize link resources [23][24][25].…”

Multi-synchronization of chaos via linear output feedback strategy

“…Dual and dual cross synchronization of chaotic external cavity laser diodes have been investigated in [10]. In [6,11] dual synchronization of chaos in two pairs of one-way coupled microchip lasers using only one transmission channel have been studied. In [12] dual synchronization using the time dependent linear output feedback is presented.…”