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We present an efficient scheme for the generation and control of a degeneratefour-wave mixing (FWM) signal in a N-type inhomogeneously broadened 85Rb atomicsystem. We observe the propagation dynamics of the generated FWM signal alongwith the probe pulse under the condition of Electromagnetically InducedTransparency. The FWM signal clones the temporal shape of the probe pulse andtravels through the medium without changing its shape and intensity. We havealso shown that a time dependent control field permits the storage andretrieval of these optical signals without losing their identity. This workallows us to generate, control, store and retrieve FWM signal of any arbiraryshape.

Four wave mixing based generation and control of light pulse