Abstract

A principal possibility of formation of quantum squeezed states for nonlinear dynamic scattering (diffraction) of light in a spatially periodic medium has been established by us earlier. The fundamental physical cause of their appearance is the energy exchange and competition between two phase-conjugated modes. Such behavior is transferred to the fluctuations as well, and so their pumping-over between different modes results in the effect of suppression (or enhancement) of the field quadratures and also in super- and/or antibunching effects. The wave aspect is principal for the understanding of such quantum states of light as a result of quantum interference under the Bragg resonance condition. The effect of compression of laser pulses (“squeezing" over time) occurs as well when the wave packet passes through such a distributed feedback (DFB) system. The phenomenon is determined by dependence on frequency of the propagation directions of diffracted (because of the grating) components of the wave envelopes, i.e., by the appearance of a dispersive (in space) delay line. Both above-mentioned processes develop simultaneously and are coupled to each other.

© 1994 IEEE