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Operation of an all-fibre-optic-logic AND gate is demonstrated. The logic gate consists of a birefringent fibre, a coiled fibre used as a quarter-wave plate, and a highly birefringent fibre as a polariser. The 9 dB extinction ratio of ‘on’ and ‘off’ states is achieved for the all-fibre-type AND gate.
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Kimura et al. (1986) studied this question.
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