A reactor-laser system, consisting of a BARS-6 double-core aperiodic pulsed reactor operating on fast neutrons and equipment for performing investigations of the laser radiation generation by direct nuclear pumping, is described. The neutron-physical characteristics of the reactor and the laser unit as well as the reactor-laser unit system are presented. The special features of the formation of fission pulses and the parameters of the pulses are indicated. 8 figures, 1 table, 12 references.