  We investigate the process of entangled state of light generation while
propagation along a one dimensional array of single-mode nonlinear waveguides.
We consider a situation when entanglement is formed due to spontaneous
parametric down-conversion of the pump which is present only in a signal
waveguide. In the considered process the generated state of light is multi-mode
squeezed. We demonstrate that starting from certain distance of light
propagation only pairs of waveguides, located symmetrically with respect to the
pumped one, occur to be entangled. Also there is an optimal pump amplitude for
which the formed quantum correlations are most pronounced. Entanglement for
multi-mode squeezed states may be very sensitive for phase fluctuations in the
pump. We investigate the influence of such noise on the discussed process. We
demonstrate that for situation of generation of few photon entangled states the
influence of phase fluctuations is negligible. But it dramatically increase
with the growth of average photon numbers in the formed quantum states.
