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Frequency-multiplexed logic circuit based on a coherent optical neural network

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Abstract

We propose an adaptive logic circuit whose function can be controlled by optical carrier frequency modulation. The circuit learns the desired functions by adjusting the delay time at a spatial light modulator with a complex-valued Hebbian learning rule. After the learning, the circuit can switch its function all at once. A high degree of mechanical stability is achieved by spatial phase-difference coding. Two orthogonal phase components are detected in parallel spatially. Experiments demonstrate that the system works as an and circuit at a certain frequency and as an xor at another. The proposal will enhance the design of optical plastic cell architectures.

© 2005 Optical Society of America

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