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We report the observation of high-intensity sub-Poissonian light using the correlated ``twin'' beams generated by an optical parametric oscillator. The intensity fluctuations in one of these beams are reduced by a feedforward correction mechanism that monitors the intensity of the second beam. The observed reduction in noise power is up to 24% below the shot-noise limit.
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Mertz et al. (1990) studied this question.
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