  We present results obtained for a network of four delay-coupled lasers
modelled by Lang-Kobayashi-type equations. We find small chimera states
consisting of a pair of synchronized lasers and two unsynchronized lasers. One
class of these small chimera states can be understood as intermediate steps on
the route from synchronization to desynchronization and we present the entire
chain of bifurcations giving birth to them. This class of small chimeras can
exhibit limit-cycle or quasiperiodic dynamics. A second type of small chimera
states exists apparently disconnected from any region of synchronization,
arising from pair synchronization inside the chaotic desynchronized regime. In
contrast to previously reported chimera states in globally coupled networks, we
find that the small chimera state is the only stable solution of the system for
certain parameter regions, i.e. we do not need to specially prepare initial
conditions.
