Experiments on chaos synchronization in two separate microchip lasers

Abstract
Synchronization of chaos generated in two Nd:YVO4 microchip lasers is experimentally demonstrated with master–slave coupling schemes. For synchronization of chaos, precise locking of the sustained relaxation-oscillation frequency is required, as is optical frequency locking. One needs to match both the pump-modulation parameters for chaos generation and the laser parameters of the two lasers to generate perfectly synchronized chaotic spectra in the master–slave type I coupling scheme.