We have achieved dual synchronization of chaos in two pairs of one-way coupled Nd:YVO<sub>4</sub> 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.
© 2003 Optical Society of America
(060.4230) Fiber optics and optical communications : Multiplexing
(060.4510) Fiber optics and optical communications : Optical communications
(140.1540) Lasers and laser optics : Chaos
(190.3100) Nonlinear optics : Instabilities and chaos
A. Uchida, S. Kinugawa, T. Matsuura, and S. Yoshimori, "Dual synchronization of chaos in microchip lasers," Opt. Lett. 28, 19-21 (2003)