Synchronization and multimode dynamics of mutually coupled semiconductor lasers

The dynamics of coupled semiconductor lasers is investigated by numerical simulations. A realistic laser simulation engine is used to study the synchronization and dynamical regime in two mutually coupled Fabry-P\'erot and/or distributed feedback lasers. Both single- and multimode operation regimes are studied, with emphasis on the role of the multiple laser-cavity modes. Our findings indicate that the two lasers synchronize within each laser-cavity mode, while the synchronization across different cavity modes is significantly weaker.