Generation of transmitted and reflected waves in induced superradiance

The generation of reflected and transmitted waves in induced superradiance is investigated. It is demonstrated that the exponential increase in the am plitude of the total field at the linear stage of the process may be accomp anied by a periodic cooperative exchange between the forward and backward w aves in a sample. Transition to the nonlinear stage in a certain phase of t his exchange determines the predominance of the transmitted or reflected wa ve in the pulse. The influence of the area of the initiating pulse and the sample length is considered.