A 2D optical neuron array and its bipolar optical interconnection system are presented. Each neuron in the array consists of a liquid crystal cell and two photodetectors that detect the encoded positive and negative light inputs respectively. The transmissivity of the LC cell that represents state of the neuron is determined by the subtraction of lights that are incident onto the two photodetectors. An optical fully interconnected neural system using the neuron array and a lenslet array for bipolar interconnection is proposed.
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