Synchronization of chaos is achieved experimentally in unidirectionally coupled external-cavity vertical-cavity surface-emitting semiconductor lasers operating in an open-loop regime. Synchronization is observed when the polarization of the transmitter is perpendicular to the polarization (<i>x</i> polarization) of the free-running receiver. The ratio of transmitter output to y -polarized receiver output power shows normal (positive-slope) synchronization. However, inverse (negative-slope) synchronization is found to arise between the transmitter output and the <i>x</i> -polarized receiver output power.
© 2004 Optical Society of America
(060.4510) Fiber optics and optical communications : Optical communications
(140.1540) Lasers and laser optics : Chaos
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers
(260.5430) Physical optics : Polarization
Yanhua Hong, Min Won Lee, Paul S. Spencer, and K. Alan Shore, "Synchronization of chaos in unidirectionally coupled vertical-cavity surface-emitting semiconductor lasers," Opt. Lett. 29, 1215-1217 (2004)