  Optical parametric process occurring in a photonic band-gap planar waveguide
is studied from the point of view of nonclassical-light generation. Nonlinearly
interacting optical fields are described by the generalized superposition of
coherent signals and noise using the method of operator linear corrections to a
classical strong solution. Scattered backward-propagating fields are taken into
account. Squeezed light as well as light with sub-Poissonian statistics can be
obtained in two-mode fields under the specified conditions.
