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Optical logic gates using coherent feedback
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DOI：10.1063/1.4767133.png)
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Abstract
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We experimentally demonstrate optical logic or and nor gates via coherent feedback. Based on a four-wave mixing process in hot rubidium vapor, two feedback beams are capable of fulfilling an optical nor gate for the feedback-suppressed state and an optical or gate for the feedback-boosted state simultaneously. The logic gates exhibit transition times faster than previously demonstrated in rubidium vapor. Coherent photon conversion between the two logic states, due to the atomic coherence, is observed in the coherent feedback process. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767133]
Keywords:
light coherence
multiwave mixing
optical feedback
optical logic
rubidium
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