We demonstrate as much as 2.5 × 10(5) amplification of a photon-echo signal using a simple external-cavity amplifier. The method may be useful in regeneration of photon echo and memory refresh in a dynamic photon-echo optical memory system. We propose an image storage system that is capable of regeneration and amplification of phase-conjugate images in a feedback loop.
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Ham et al. (1994) studied this question.
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