R. E. Slusher, L. W. Hollberg, B. Yurke, J. C. Mertz, and J. F. Valley
AT&T Bell Laboratories recently demonstrated squeezed light using nondegenerate four-wave mixing in a sodium atomic beam to parametrically amplify and deamplify the noise fluctuations in the modes of an optical cavity. Squeezed light exiting the cavity through a partially transmitting mirror is detected by a balanced homodyne detector, which measures the squeezed field split off from the pump light.
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