Paper detail

Four wave mixing based generation and control of light pulse

We present an efficient scheme for the generation and control of a degenerate four-wave mixing (FWM) signal in a N-type inhomogeneously broadened 85Rb atomic system. We observe the propagation dynamics of the generated FWM signal along with the probe pulse under the condition of Electromagnetically Induced Transparency. The FWM signal clones the temporal shape of the probe pulse and travels through the medium without changing its shape and intensity. We have also shown that a time dependent control field permits the storage and retrieval of these optical signals without losing their identity. This work allows us to generate, control, store and retrieve FWM signal of any arbirary shape.