COMPENSATION FOR HOMOGENEOUS DEPHASING IN COHERENT TRANSIENT OPTICAL MEMORIES AND PROCESSORS

We propose and experimentally demonstrate a technique that compensates for the deleterious effects of homogeneous dephasing on the output si gnal of coherent transient optical memories and processors. In coheren t transient memories without compensation, storage of information patt ern streams with durations on the order of the homogeneous transverse dephasing time, T-2, experiences significant distortions due to expone ntial decay;By appropriately tailoring the intensity of the input patt ern information stream, we show such a pattern stream can be recalled with relatively uniform power in each bit. In processors without compe nsation, we show that patterns of duration similar to T-2 can cause di stortions in the emitted correlation output, and that compensation can remove this distortion. Our experimental demonstrations of extending the practicable duration of pattern pulses represent roughly an order of magnitude improvement in (a) the storage density of coherent transi ent optical memories, and (b) the time-bandwidth product of coherent t ransient optical processors.