SQUEEZING OF CW LIGHT IN A SINGLE-MODE DISPERSIVE CHI((2)) MEDIUM

We present a unified analysis of the quantum fluctuations and quadratu re squeezing of continuous wave (cw) light propagating in a single-mod e quadratic (chi((2))) waveguide. We retain the effects of wave-vector and group-velocity mismatch, group-velocity dispersion, and depletion by linearizing the quantum fluctuations with respect to the the exact cw nonlinear semiclassical evolution. Each of the characteristic thre e-wave mixing phenomena, including parametric amplification, second-ha rmonic generation, and special eigenmode solutions are discussed and c ontrasted. Regimes of strong squeezing, and the influence of classical parametric modulational instabilities and spatial bifurcations on the spectrum of squeezed quantum fluctuations, are discussed.