Isochronous synchronization induced by topological heterogeneity in semiconductor laser networks. (September 2022)

• Record Type: Journal Article
• Authors: Zhang, Liyue; Pan, Wei; Yan, Lianshan; Luo, Bin; Zou, Xihua; Li, Songsui
• Is Part Of: Optics & laser technology. Volume 153(2022)
• Publication Date: 2022-09
• Subjects: Semiconducter Lasers -- Chaos Synchronization -- Complex Network; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2022.108243
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: Topological heterogeneity could facilitate the isochronous synchronization in SLs network. Topological heterogeneity is induced by modifying the internal coupling link between sub-lasers. The heterogeneity induced synchronization is robust to system parameters. The generality of heterogeneity facilitated synchronization is also validated. Abstract: Previous work in the synchronization of semiconductor lasers (SLs) have suggest that networks with symmetric topology and homogenous parameters will be more likely to achieve synchronous states. In this work, we realize a counter-intuitive effect in SL network and show that topological heterogeneity could definitely facilitate the isochronous synchronization rather than impair that of SL networks, compared to symmetric network topology. Each SL of symmetric network is decomposed into 2 sub-nodes and the heterogeneity of network topology can be defined by the internal connection between subnodes. The influences of crucial parameters in heterogeneous SL networks on the stability of isochronous synchronization are systematically evaluated. We also calculate the maximum Lyapunov exponent of SL output to reveal the parameter space for isochronous synchronization with chaotic dynamics. Additionally, the generality of heterogeneity induced synchronization is validated for a network with different types of coupling links and topological heterogeneity. As the heterogeneity is ubiquitous in real world network topology, our results suggest a new mechanism for the topological control of synchronization in complex SL networks.