Abstract
We present a new experimental setup for the optical storage of information via refreshing by inverse seeding (OSIRIS), which allows a sixfold increase of the storage time of holograms in a Ba0.77Ca0.23TiO3 crystal (BCT). The setup consists of two four-wave mixing processes with common amplified signal waves and phase-conjugated (pc) waves. Temporal behaviours of the amplified and pc signal waves for the OSIRIS experiment as well as for the common four-wave mixing experiment are compared and discussed. The solutions of coupled equations under the depleted-pump approximation are obtained in order to estimate the pc reflectivities and coupling gains of gratings inside the crystal.
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