The synchronization of chaotic lasers and the optical phase synchronization of light originating in multiple coupled lasers have both been extensively studied. However, the interplay between these two phenomena, especially at the network level, is unexplored. Here, we experimentally compare these phenomena by controlling the heterogeneity of the coupling delay times of two lasers. While chaotic lasers exhibit deterioration in synchronization as the time delay heterogeneity increases, phase synchronization is found to be independent of heterogeneity. The experimental results are found to be in agreement with numerical simulations for semiconductor lasers.
© 2013 Optical Society of America
Lasers and Laser Optics
Original Manuscript: July 3, 2013
Revised Manuscript: September 8, 2013
Manuscript Accepted: September 10, 2013
Published: October 11, 2013
I. Reidler, M. Nixon, Y. Aviad, S. Guberman, A. A. Friesem, M. Rosenbluh, N. Davidson, and I. Kanter, "Coupled lasers: phase versus chaos synchronization," Opt. Lett. 38, 4174-4177 (2013)