Abstract

It is well known that nondegenerate four-wave mixing is one of the main mechanisms to produce nonclassical states of the electromagnetic field. As a matter of fact, the squeezing effect was first observed in this configuration¹. Recently, sub-shot noise character in the fluctuations in the difference of the intensities of the two signal beams has been experimentally detected², in analogy with the well known case of nondegenerate parametric oscillators³.

© 1991 Optical Society of America