Optimal control of optical pulse propagation in a medium of three-level systems

We develop an optimal control technique (OCT) in order to design a secondary optical pulse that can control the propagation of an arbitrary primary optical pulse in a medium consisting of three-level systems. The output primary pulse shape can be manipulated by designing the shape of the secondary pulse. The OCT is shown to be better than the earlier proposed pulse schemes for protecting the magnitude and shape of the primary pulse from reshaping by the medium.