Abstract

We present the results of an experiment in which we observed photon-number statistics of twin beams emerging from a nondegenerate optical parametric oscillator. We generated the photocurrent for recording by detecting the light and mixing it with a standard electrical oscillator. The measured photocurrent variances exhibited a quantum correlation of as much as $-4.9 \mathrm{dB}$ between signal and idler, whereas their photon number distributions were super-Poissonian. We also obtained the difference photon-number distribution.

© 2002 Optical Society of America

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