Generation of nonclassical states of the light by electro-optic nonlinear effects

Optical nonlinearity is an important process for generating nonclassical states of the light such as squeezed states[1] and nonclassical correlation states [2]. We will demonstrate a new type of nonlinearity, electro-optic nonlinearity in a hybrid AOM device, for generating nonclassical states. The electro-optic nonlinearity in the hybrid devices has been widely used in the studies of optical bistability and chaos [3]. The main difference between the hibrid OB device and our squeezing AOM device is that in the OB case the feedback optic-electron signal is in relation to the intensity of the output light, but in the squeezing case the feedback signal is proportional to the photocurrent fluctution which is in relation to the quadrature phase fluctuation or to the intensity fluctuation of the output light.